Finding the Fourth Proportional to 13,128.29, 19,700.64 and 5,337.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.29 : 19,700.64 = 5,337.10 : x
2. Step 2: Convert to fraction form
   13,128.29/19,700.64 = 5,337.10/x
3. Step 3: Cross multiply
   13,128.29x = 19,700.64 × 5,337.10
4. Step 4: Simplify right side
   13,128.29x = 105,144,310.37
5. Step 5: Solve for x
   x = 105,144,310.37/13,128.29
6. Step 6: Final answer
   x = 8,008.99