Finding the Fourth Proportional to 78,046.72, 107,704.08 and 42,236.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,046.72 : 107,704.08 = 42,236.74 : x
2. Step 2: Convert to fraction form
   78,046.72/107,704.08 = 42,236.74/x
3. Step 3: Cross multiply
   78,046.72x = 107,704.08 × 42,236.74
4. Step 4: Simplify right side
   78,046.72x = 4,549,069,358.53
5. Step 5: Solve for x
   x = 4,549,069,358.53/78,046.72
6. Step 6: Final answer
   x = 58,286.49