Finding the Fourth Proportional to 9,772.10, 13,715.50 and 9,772.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,772.10 : 13,715.50 = 9,772.10 : x
2. Step 2: Convert to fraction form
   9,772.10/13,715.50 = 9,772.10/x
3. Step 3: Cross multiply
   9,772.10x = 13,715.50 × 9,772.10
4. Step 4: Simplify right side
   9,772.10x = 134,029,237.55
5. Step 5: Solve for x
   x = 134,029,237.55/9,772.10
6. Step 6: Final answer
   x = 13,715.50