Finding the Fourth Proportional to 77,857.58, 107,443.47 and 42,047.60

Step by Step Solution

1. Step 1: Write the proportion equation
   77,857.58 : 107,443.47 = 42,047.60 : x
2. Step 2: Convert to fraction form
   77,857.58/107,443.47 = 42,047.60/x
3. Step 3: Cross multiply
   77,857.58x = 107,443.47 × 42,047.60
4. Step 4: Simplify right side
   77,857.58x = 4,517,739,301.72
5. Step 5: Solve for x
   x = 4,517,739,301.72/77,857.58
6. Step 6: Final answer
   x = 58,025.68