Finding the Fourth Proportional to 56,422.50, 77,868.72 and 31,276.86

Step by Step Solution

1. Step 1: Write the proportion equation
   56,422.50 : 77,868.72 = 31,276.86 : x
2. Step 2: Convert to fraction form
   56,422.50/77,868.72 = 31,276.86/x
3. Step 3: Cross multiply
   56,422.50x = 77,868.72 × 31,276.86
4. Step 4: Simplify right side
   56,422.50x = 2,435,489,053.82
5. Step 5: Solve for x
   x = 2,435,489,053.82/56,422.50
6. Step 6: Final answer
   x = 43,165.21