Finding the Fourth Proportional to 78,012.39, 107,657.04 and 42,202.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,012.39 : 107,657.04 = 42,202.43 : x
2. Step 2: Convert to fraction form
   78,012.39/107,657.04 = 42,202.43/x
3. Step 3: Cross multiply
   78,012.39x = 107,657.04 × 42,202.43
4. Step 4: Simplify right side
   78,012.39x = 4,543,388,156.32
5. Step 5: Solve for x
   x = 4,543,388,156.32/78,012.39
6. Step 6: Final answer
   x = 58,239.32