Finding the Fourth Proportional to 56,686.08, 78,231.52 and 31,540.32

Step by Step Solution

1. Step 1: Write the proportion equation
   56,686.08 : 78,231.52 = 31,540.32 : x
2. Step 2: Convert to fraction form
   56,686.08/78,231.52 = 31,540.32/x
3. Step 3: Cross multiply
   56,686.08x = 78,231.52 × 31,540.32
4. Step 4: Simplify right side
   56,686.08x = 2,467,447,174.89
5. Step 5: Solve for x
   x = 2,467,447,174.89/56,686.08
6. Step 6: Final answer
   x = 43,528.27