Finding the Fourth Proportional to 1,158,902.10, 1,738,353.15 and 1,139,219.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158,902.10 : 1,738,353.15 = 1,139,219.10 : x
2. Step 2: Convert to fraction form
   1,158,902.10/1,738,353.15 = 1,139,219.10/x
3. Step 3: Cross multiply
   1,158,902.10x = 1,738,353.15 × 1,139,219.10
4. Step 4: Simplify right side
   1,158,902.10x = 1,980,365,111,025.17
5. Step 5: Solve for x
   x = 1,980,365,111,025.17/1,158,902.10
6. Step 6: Final answer
   x = 1,708,828.65