Finding the Fourth Proportional to 57,157.40, 78,875.38 and 31,662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,157.40 : 78,875.38 = 31,662.72 : x
2. Step 2: Convert to fraction form
   57,157.40/78,875.38 = 31,662.72/x
3. Step 3: Cross multiply
   57,157.40x = 78,875.38 × 31,662.72
4. Step 4: Simplify right side
   57,157.40x = 2,497,409,071.83
5. Step 5: Solve for x
   x = 2,497,409,071.83/57,157.40
6. Step 6: Final answer
   x = 43,693.54