Finding the Fourth Proportional to 56,971.52, 78,621.76 and 31,479.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,971.52 : 78,621.76 = 31,479.30 : x
2. Step 2: Convert to fraction form
   56,971.52/78,621.76 = 31,479.30/x
3. Step 3: Cross multiply
   56,971.52x = 78,621.76 × 31,479.30
4. Step 4: Simplify right side
   56,971.52x = 2,474,957,969.57
5. Step 5: Solve for x
   x = 2,474,957,969.57/56,971.52
6. Step 6: Final answer
   x = 43,442.02