Finding the Fourth Proportional to 43,131.86, 64,697.17 and 13,551.47

Step by Step Solution

1. Step 1: Write the proportion equation
   43,131.86 : 64,697.17 = 13,551.47 : x
2. Step 2: Convert to fraction form
   43,131.86/64,697.17 = 13,551.47/x
3. Step 3: Cross multiply
   43,131.86x = 64,697.17 × 13,551.47
4. Step 4: Simplify right side
   43,131.86x = 876,741,758.34
5. Step 5: Solve for x
   x = 876,741,758.34/43,131.86
6. Step 6: Final answer
   x = 20,327.01