Finding the Fourth Proportional to 78,342.69, 108,112.34 and 42,531.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,342.69 : 108,112.34 = 42,531.78 : x
2. Step 2: Convert to fraction form
   78,342.69/108,112.34 = 42,531.78/x
3. Step 3: Cross multiply
   78,342.69x = 108,112.34 × 42,531.78
4. Step 4: Simplify right side
   78,342.69x = 4,598,210,532.67
5. Step 5: Solve for x
   x = 4,598,210,532.67/78,342.69
6. Step 6: Final answer
   x = 58,693.55