Finding the Fourth Proportional to 56,298.09, 77,690.76 and 31,147.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,298.09 : 77,690.76 = 31,147.77 : x
2. Step 2: Convert to fraction form
   56,298.09/77,690.76 = 31,147.77/x
3. Step 3: Cross multiply
   56,298.09x = 77,690.76 × 31,147.77
4. Step 4: Simplify right side
   56,298.09x = 2,419,893,923.61
5. Step 5: Solve for x
   x = 2,419,893,923.61/56,298.09
6. Step 6: Final answer
   x = 42,983.59