Finding the Fourth Proportional to 9,113.30, 12,732.70 and 9,113.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,113.30 : 12,732.70 = 9,113.30 : x
2. Step 2: Convert to fraction form
   9,113.30/12,732.70 = 9,113.30/x
3. Step 3: Cross multiply
   9,113.30x = 12,732.70 × 9,113.30
4. Step 4: Simplify right side
   9,113.30x = 116,036,914.91
5. Step 5: Solve for x
   x = 116,036,914.91/9,113.30
6. Step 6: Final answer
   x = 12,732.70