Finding the Fourth Proportional to 56,815.76, 78,406.31 and 31,323.15

Step by Step Solution

1. Step 1: Write the proportion equation
   56,815.76 : 78,406.31 = 31,323.15 : x
2. Step 2: Convert to fraction form
   56,815.76/78,406.31 = 31,323.15/x
3. Step 3: Cross multiply
   56,815.76x = 78,406.31 × 31,323.15
4. Step 4: Simplify right side
   56,815.76x = 2,455,932,609.08
5. Step 5: Solve for x
   x = 2,455,932,609.08/56,815.76
6. Step 6: Final answer
   x = 43,226.26