Finding the Fourth Proportional to 64,876.17, 89,513.82 and 39,381.90

Step by Step Solution

1. Step 1: Write the proportion equation
   64,876.17 : 89,513.82 = 39,381.90 : x
2. Step 2: Convert to fraction form
   64,876.17/89,513.82 = 39,381.90/x
3. Step 3: Cross multiply
   64,876.17x = 89,513.82 × 39,381.90
4. Step 4: Simplify right side
   64,876.17x = 3,525,224,307.86
5. Step 5: Solve for x
   x = 3,525,224,307.86/64,876.17
6. Step 6: Final answer
   x = 54,337.74