Finding the Fourth Proportional to 9,720.85, 14,510.72 and 9,037.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.85 : 14,510.72 = 9,037.21 : x
2. Step 2: Convert to fraction form
   9,720.85/14,510.72 = 9,037.21/x
3. Step 3: Cross multiply
   9,720.85x = 14,510.72 × 9,037.21
4. Step 4: Simplify right side
   9,720.85x = 131,136,423.89
5. Step 5: Solve for x
   x = 131,136,423.89/9,720.85
6. Step 6: Final answer
   x = 13,490.22