Finding the Fourth Proportional to 62,778.48, 86,576.36 and 42,665.37

Step by Step Solution

1. Step 1: Write the proportion equation
   62,778.48 : 86,576.36 = 42,665.37 : x
2. Step 2: Convert to fraction form
   62,778.48/86,576.36 = 42,665.37/x
3. Step 3: Cross multiply
   62,778.48x = 86,576.36 × 42,665.37
4. Step 4: Simplify right side
   62,778.48x = 3,693,812,219.33
5. Step 5: Solve for x
   x = 3,693,812,219.33/62,778.48
6. Step 6: Final answer
   x = 58,838.83