Finding the Fourth Proportional to 56,345.94, 77,674.56 and 42,893.76

Step by Step Solution

1. Step 1: Write the proportion equation
   56,345.94 : 77,674.56 = 42,893.76 : x
2. Step 2: Convert to fraction form
   56,345.94/77,674.56 = 42,893.76/x
3. Step 3: Cross multiply
   56,345.94x = 77,674.56 × 42,893.76
4. Step 4: Simplify right side
   56,345.94x = 3,331,753,934.75
5. Step 5: Solve for x
   x = 3,331,753,934.75/56,345.94
6. Step 6: Final answer
   x = 59,130.33