Finding the Fourth Proportional to 78,078.55, 107,748.27 and 42,268.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,078.55 : 107,748.27 = 42,268.56 : x
2. Step 2: Convert to fraction form
   78,078.55/107,748.27 = 42,268.56/x
3. Step 3: Cross multiply
   78,078.55x = 107,748.27 × 42,268.56
4. Step 4: Simplify right side
   78,078.55x = 4,554,364,215.39
5. Step 5: Solve for x
   x = 4,554,364,215.39/78,078.55
6. Step 6: Final answer
   x = 58,330.54