Finding the Fourth Proportional to 1,433,702.80, 1,978,494.20 and 789,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433,702.80 : 1,978,494.20 = 789,109.12 : x
2. Step 2: Convert to fraction form
   1,433,702.80/1,978,494.20 = 789,109.12/x
3. Step 3: Cross multiply
   1,433,702.80x = 1,978,494.20 × 789,109.12
4. Step 4: Simplify right side
   1,433,702.80x = 1,561,247,817,087.10
5. Step 5: Solve for x
   x = 1,561,247,817,087.10/1,433,702.80
6. Step 6: Final answer
   x = 1,088,961.96