Finding the Fourth Proportional to 78,575.27, 108,436.19 and 42,767.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,575.27 : 108,436.19 = 42,767.60 : x
2. Step 2: Convert to fraction form
   78,575.27/108,436.19 = 42,767.60/x
3. Step 3: Cross multiply
   78,575.27x = 108,436.19 × 42,767.60
4. Step 4: Simplify right side
   78,575.27x = 4,637,554,843.43
5. Step 5: Solve for x
   x = 4,637,554,843.43/78,575.27
6. Step 6: Final answer
   x = 59,020.54