Finding the Fourth Proportional to 78,079.68, 107,749.20 and 42,268.77

Step by Step Solution

1. Step 1: Write the proportion equation
   78,079.68 : 107,749.20 = 42,268.77 : x
2. Step 2: Convert to fraction form
   78,079.68/107,749.20 = 42,268.77/x
3. Step 3: Cross multiply
   78,079.68x = 107,749.20 × 42,268.77
4. Step 4: Simplify right side
   78,079.68x = 4,554,426,152.48
5. Step 5: Solve for x
   x = 4,554,426,152.48/78,079.68
6. Step 6: Final answer
   x = 58,330.49