Finding the Fourth Proportional to 138,499.47, 207,675.36 and 71,872.52

Step by Step Solution

1. Step 1: Write the proportion equation
   138,499.47 : 207,675.36 = 71,872.52 : x
2. Step 2: Convert to fraction form
   138,499.47/207,675.36 = 71,872.52/x
3. Step 3: Cross multiply
   138,499.47x = 207,675.36 × 71,872.52
4. Step 4: Simplify right side
   138,499.47x = 14,926,150,426.73
5. Step 5: Solve for x
   x = 14,926,150,426.73/138,499.47
6. Step 6: Final answer
   x = 107,770.45