Finding the Fourth Proportional to 62,778.98, 86,577.05 and 42,665.87

Step by Step Solution

1. Step 1: Write the proportion equation
   62,778.98 : 86,577.05 = 42,665.87 : x
2. Step 2: Convert to fraction form
   62,778.98/86,577.05 = 42,665.87/x
3. Step 3: Cross multiply
   62,778.98x = 86,577.05 × 42,665.87
4. Step 4: Simplify right side
   62,778.98x = 3,693,884,946.95
5. Step 5: Solve for x
   x = 3,693,884,946.95/62,778.98
6. Step 6: Final answer
   x = 58,839.52