Finding the Fourth Proportional to 56,818.77, 78,410.45 and 31,326.15

Step by Step Solution

1. Step 1: Write the proportion equation
   56,818.77 : 78,410.45 = 31,326.15 : x
2. Step 2: Convert to fraction form
   56,818.77/78,410.45 = 31,326.15/x
3. Step 3: Cross multiply
   56,818.77x = 78,410.45 × 31,326.15
4. Step 4: Simplify right side
   56,818.77x = 2,456,297,518.27
5. Step 5: Solve for x
   x = 2,456,297,518.27/56,818.77
6. Step 6: Final answer
   x = 43,230.39