Finding the Fourth Proportional to 77,857.76, 107,443.71 and 42,047.78

Step by Step Solution

1. Step 1: Write the proportion equation
   77,857.76 : 107,443.71 = 42,047.78 : x
2. Step 2: Convert to fraction form
   77,857.76/107,443.71 = 42,047.78/x
3. Step 3: Cross multiply
   77,857.76x = 107,443.71 × 42,047.78
4. Step 4: Simplify right side
   77,857.76x = 4,517,768,943.25
5. Step 5: Solve for x
   x = 4,517,768,943.25/77,857.76
6. Step 6: Final answer
   x = 58,025.93