Finding the Fourth Proportional to 1,019,507,158.67, 1,406,050,656.28 and 861,508,830.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019,507,158.67 : 1,406,050,656.28 = 861,508,830.83 : x
2. Step 2: Convert to fraction form
   1,019,507,158.67/1,406,050,656.28 = 861,508,830.83/x
3. Step 3: Cross multiply
   1,019,507,158.67x = 1,406,050,656.28 × 861,508,830.83
4. Step 4: Simplify right side
   1,019,507,158.67x = 1,211,325,056,970,352,896
5. Step 5: Solve for x
   x = 1,211,325,056,970,352,896/1,019,507,158.67
6. Step 6: Final answer
   x = 1,188,147,671.82