Finding the Fourth Proportional to 78,579.91, 108,440.29 and 42,770.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,579.91 : 108,440.29 = 42,770.18 : x
2. Step 2: Convert to fraction form
   78,579.91/108,440.29 = 42,770.18/x
3. Step 3: Cross multiply
   78,579.91x = 108,440.29 × 42,770.18
4. Step 4: Simplify right side
   78,579.91x = 4,638,010,722.55
5. Step 5: Solve for x
   x = 4,638,010,722.55/78,579.91
6. Step 6: Final answer
   x = 59,022.86