Finding the Fourth Proportional to 58,665.28, 80,958.16 and 31,807.78

Step by Step Solution

1. Step 1: Write the proportion equation
   58,665.28 : 80,958.16 = 31,807.78 : x
2. Step 2: Convert to fraction form
   58,665.28/80,958.16 = 31,807.78/x
3. Step 3: Cross multiply
   58,665.28x = 80,958.16 × 31,807.78
4. Step 4: Simplify right side
   58,665.28x = 2,575,099,342.48
5. Step 5: Solve for x
   x = 2,575,099,342.48/58,665.28
6. Step 6: Final answer
   x = 43,894.78