Finding the Fourth Proportional to 78,661.10, 108,551.78 and 42,851.13

Step by Step Solution

1. Step 1: Write the proportion equation
   78,661.10 : 108,551.78 = 42,851.13 : x
2. Step 2: Convert to fraction form
   78,661.10/108,551.78 = 42,851.13/x
3. Step 3: Cross multiply
   78,661.10x = 108,551.78 × 42,851.13
4. Step 4: Simplify right side
   78,661.10x = 4,651,566,436.51
5. Step 5: Solve for x
   x = 4,651,566,436.51/78,661.10
6. Step 6: Final answer
   x = 59,134.27