Finding the Fourth Proportional to 65,139.03, 89,820.47 and 42,435.92

Step by Step Solution

1. Step 1: Write the proportion equation
   65,139.03 : 89,820.47 = 42,435.92 : x
2. Step 2: Convert to fraction form
   65,139.03/89,820.47 = 42,435.92/x
3. Step 3: Cross multiply
   65,139.03x = 89,820.47 × 42,435.92
4. Step 4: Simplify right side
   65,139.03x = 3,811,613,618.00
5. Step 5: Solve for x
   x = 3,811,613,618.00/65,139.03
6. Step 6: Final answer
   x = 58,515.05