Finding the Fourth Proportional to 64,531.89, 89,035.81 and 38,679.93

Step by Step Solution

1. Step 1: Write the proportion equation
   64,531.89 : 89,035.81 = 38,679.93 : x
2. Step 2: Convert to fraction form
   64,531.89/89,035.81 = 38,679.93/x
3. Step 3: Cross multiply
   64,531.89x = 89,035.81 × 38,679.93
4. Step 4: Simplify right side
   64,531.89x = 3,443,898,801.59
5. Step 5: Solve for x
   x = 3,443,898,801.59/64,531.89
6. Step 6: Final answer
   x = 53,367.39