Finding the Fourth Proportional to 71,020.86, 98,020.71 and 42,729.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,020.86 : 98,020.71 = 42,729.18 : x
2. Step 2: Convert to fraction form
   71,020.86/98,020.71 = 42,729.18/x
3. Step 3: Cross multiply
   71,020.86x = 98,020.71 × 42,729.18
4. Step 4: Simplify right side
   71,020.86x = 4,188,344,561.32
5. Step 5: Solve for x
   x = 4,188,344,561.32/71,020.86
6. Step 6: Final answer
   x = 58,973.44