Finding the Fourth Proportional to 64,482.42, 88,962.92 and 42,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   64,482.42 : 88,962.92 = 42,139.38 : x
2. Step 2: Convert to fraction form
   64,482.42/88,962.92 = 42,139.38/x
3. Step 3: Cross multiply
   64,482.42x = 88,962.92 × 42,139.38
4. Step 4: Simplify right side
   64,482.42x = 3,748,842,291.79
5. Step 5: Solve for x
   x = 3,748,842,291.79/64,482.42
6. Step 6: Final answer
   x = 58,137.43