Finding the Fourth Proportional to 78,013.24, 107,657.72 and 42,202.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,013.24 : 107,657.72 = 42,202.72 : x
2. Step 2: Convert to fraction form
   78,013.24/107,657.72 = 42,202.72/x
3. Step 3: Cross multiply
   78,013.24x = 107,657.72 × 42,202.72
4. Step 4: Simplify right side
   78,013.24x = 4,543,448,613.00
5. Step 5: Solve for x
   x = 4,543,448,613.00/78,013.24
6. Step 6: Final answer
   x = 58,239.46