Finding the Fourth Proportional to 78,301.10, 108,054.96 and 42,490.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,301.10 : 108,054.96 = 42,490.20 : x
2. Step 2: Convert to fraction form
   78,301.10/108,054.96 = 42,490.20/x
3. Step 3: Cross multiply
   78,301.10x = 108,054.96 × 42,490.20
4. Step 4: Simplify right side
   78,301.10x = 4,591,276,861.39
5. Step 5: Solve for x
   x = 4,591,276,861.39/78,301.10
6. Step 6: Final answer
   x = 58,636.17