Finding the Fourth Proportional to 77,857.68, 107,443.59 and 42,047.70

Step by Step Solution

1. Step 1: Write the proportion equation
   77,857.68 : 107,443.59 = 42,047.70 : x
2. Step 2: Convert to fraction form
   77,857.68/107,443.59 = 42,047.70/x
3. Step 3: Cross multiply
   77,857.68x = 107,443.59 × 42,047.70
4. Step 4: Simplify right side
   77,857.68x = 4,517,755,839.24
5. Step 5: Solve for x
   x = 4,517,755,839.24/77,857.68
6. Step 6: Final answer
   x = 58,025.82