Finding the Fourth Proportional to 9,787.30, 13,222.58 and 9,787.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,787.30 : 13,222.58 = 9,787.30 : x
2. Step 2: Convert to fraction form
   9,787.30/13,222.58 = 9,787.30/x
3. Step 3: Cross multiply
   9,787.30x = 13,222.58 × 9,787.30
4. Step 4: Simplify right side
   9,787.30x = 129,413,357.23
5. Step 5: Solve for x
   x = 129,413,357.23/9,787.30
6. Step 6: Final answer
   x = 13,222.58