Finding the Fourth Proportional to 77,091.75, 115,686.83 and 42,031.41

Step by Step Solution

1. Step 1: Write the proportion equation
   77,091.75 : 115,686.83 = 42,031.41 : x
2. Step 2: Convert to fraction form
   77,091.75/115,686.83 = 42,031.41/x
3. Step 3: Cross multiply
   77,091.75x = 115,686.83 × 42,031.41
4. Step 4: Simplify right side
   77,091.75x = 4,862,480,254.58
5. Step 5: Solve for x
   x = 4,862,480,254.58/77,091.75
6. Step 6: Final answer
   x = 63,073.94