Finding the Fourth Proportional to 1,433,722.86, 1,978,521.84 and 789,129.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433,722.86 : 1,978,521.84 = 789,129.18 : x
2. Step 2: Convert to fraction form
   1,433,722.86/1,978,521.84 = 789,129.18/x
3. Step 3: Cross multiply
   1,433,722.86x = 1,978,521.84 × 789,129.18
4. Step 4: Simplify right side
   1,433,722.86x = 1,561,309,317,211.29
5. Step 5: Solve for x
   x = 1,561,309,317,211.29/1,433,722.86
6. Step 6: Final answer
   x = 1,088,989.62