Finding the Fourth Proportional to 56,412.39, 77,854.56 and 31,261.89

Step by Step Solution

1. Step 1: Write the proportion equation
   56,412.39 : 77,854.56 = 31,261.89 : x
2. Step 2: Convert to fraction form
   56,412.39/77,854.56 = 31,261.89/x
3. Step 3: Cross multiply
   56,412.39x = 77,854.56 × 31,261.89
4. Step 4: Simplify right side
   56,412.39x = 2,433,880,690.72
5. Step 5: Solve for x
   x = 2,433,880,690.72/56,412.39
6. Step 6: Final answer
   x = 43,144.43