Finding the Fourth Proportional to 64,878.71, 89,532.69 and 38,015.87

Step by Step Solution

1. Step 1: Write the proportion equation
   64,878.71 : 89,532.69 = 38,015.87 : x
2. Step 2: Convert to fraction form
   64,878.71/89,532.69 = 38,015.87/x
3. Step 3: Cross multiply
   64,878.71x = 89,532.69 × 38,015.87
4. Step 4: Simplify right side
   64,878.71x = 3,403,663,103.79
5. Step 5: Solve for x
   x = 3,403,663,103.79/64,878.71
6. Step 6: Final answer
   x = 52,461.94