Finding the Fourth Proportional to 64,172.34, 88,561.17 and 38,686.82

Step by Step Solution

1. Step 1: Write the proportion equation
   64,172.34 : 88,561.17 = 38,686.82 : x
2. Step 2: Convert to fraction form
   64,172.34/88,561.17 = 38,686.82/x
3. Step 3: Cross multiply
   64,172.34x = 88,561.17 × 38,686.82
4. Step 4: Simplify right side
   64,172.34x = 3,426,149,599.97
5. Step 5: Solve for x
   x = 3,426,149,599.97/64,172.34
6. Step 6: Final answer
   x = 53,389.82