Finding the Fourth Proportional to 9,787.20, 14,780.43 and 9,787.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,787.20 : 14,780.43 = 9,787.20 : x
2. Step 2: Convert to fraction form
   9,787.20/14,780.43 = 9,787.20/x
3. Step 3: Cross multiply
   9,787.20x = 14,780.43 × 9,787.20
4. Step 4: Simplify right side
   9,787.20x = 144,659,024.50
5. Step 5: Solve for x
   x = 144,659,024.50/9,787.20
6. Step 6: Final answer
   x = 14,780.43