Finding the Fourth Proportional to 13,128.12, 19,700.33 and 5,336.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.12 : 19,700.33 = 5,336.91 : x
2. Step 2: Convert to fraction form
   13,128.12/19,700.33 = 5,336.91/x
3. Step 3: Cross multiply
   13,128.12x = 19,700.33 × 5,336.91
4. Step 4: Simplify right side
   13,128.12x = 105,138,861.50
5. Step 5: Solve for x
   x = 105,138,861.50/13,128.12
6. Step 6: Final answer
   x = 8,008.68