Finding the Fourth Proportional to 78,013.86, 107,658.69 and 42,203.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,013.86 : 107,658.69 = 42,203.76 : x
2. Step 2: Convert to fraction form
   78,013.86/107,658.69 = 42,203.76/x
3. Step 3: Cross multiply
   78,013.86x = 107,658.69 × 42,203.76
4. Step 4: Simplify right side
   78,013.86x = 4,543,601,514.67
5. Step 5: Solve for x
   x = 4,543,601,514.67/78,013.86
6. Step 6: Final answer
   x = 58,240.95