Finding the Fourth Proportional to 43,485.71, 65,237.88 and 13,499.29

Step by Step Solution

1. Step 1: Write the proportion equation
   43,485.71 : 65,237.88 = 13,499.29 : x
2. Step 2: Convert to fraction form
   43,485.71/65,237.88 = 13,499.29/x
3. Step 3: Cross multiply
   43,485.71x = 65,237.88 × 13,499.29
4. Step 4: Simplify right side
   43,485.71x = 880,665,061.11
5. Step 5: Solve for x
   x = 880,665,061.11/43,485.71
6. Step 6: Final answer
   x = 20,251.83