Finding the Fourth Proportional to 58,909.30, 81,343.89 and 54,635.47

Step by Step Solution

1. Step 1: Write the proportion equation
   58,909.30 : 81,343.89 = 54,635.47 : x
2. Step 2: Convert to fraction form
   58,909.30/81,343.89 = 54,635.47/x
3. Step 3: Cross multiply
   58,909.30x = 81,343.89 × 54,635.47
4. Step 4: Simplify right side
   58,909.30x = 4,444,261,458.42
5. Step 5: Solve for x
   x = 4,444,261,458.42/58,909.30
6. Step 6: Final answer
   x = 75,442.45