Finding the Fourth Proportional to 78,518.10, 108,356.76 and 42,710.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,518.10 : 108,356.76 = 42,710.03 : x
2. Step 2: Convert to fraction form
   78,518.10/108,356.76 = 42,710.03/x
3. Step 3: Cross multiply
   78,518.10x = 108,356.76 × 42,710.03
4. Step 4: Simplify right side
   78,518.10x = 4,627,919,928.52
5. Step 5: Solve for x
   x = 4,627,919,928.52/78,518.10
6. Step 6: Final answer
   x = 58,940.80