Finding the Fourth Proportional to 56,490.50, 77,956.89 and 31,340.18

Step by Step Solution

1. Step 1: Write the proportion equation
   56,490.50 : 77,956.89 = 31,340.18 : x
2. Step 2: Convert to fraction form
   56,490.50/77,956.89 = 31,340.18/x
3. Step 3: Cross multiply
   56,490.50x = 77,956.89 × 31,340.18
4. Step 4: Simplify right side
   56,490.50x = 2,443,182,964.84
5. Step 5: Solve for x
   x = 2,443,182,964.84/56,490.50
6. Step 6: Final answer
   x = 43,249.45