Finding the Fourth Proportional to 81,770.07, 122,567.63 and 42,287.43

Step by Step Solution

1. Step 1: Write the proportion equation
   81,770.07 : 122,567.63 = 42,287.43 : x
2. Step 2: Convert to fraction form
   81,770.07/122,567.63 = 42,287.43/x
3. Step 3: Cross multiply
   81,770.07x = 122,567.63 × 42,287.43
4. Step 4: Simplify right side
   81,770.07x = 5,183,069,862.45
5. Step 5: Solve for x
   x = 5,183,069,862.45/81,770.07
6. Step 6: Final answer
   x = 63,385.90