Finding the Fourth Proportional to 78,575.93, 108,434.79 and 42,766.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,575.93 : 108,434.79 = 42,766.21 : x
2. Step 2: Convert to fraction form
   78,575.93/108,434.79 = 42,766.21/x
3. Step 3: Cross multiply
   78,575.93x = 108,434.79 × 42,766.21
4. Step 4: Simplify right side
   78,575.93x = 4,637,344,526.04
5. Step 5: Solve for x
   x = 4,637,344,526.04/78,575.93
6. Step 6: Final answer
   x = 59,017.36