Finding the Fourth Proportional to 108,999.10, 163,377.15 and 42,417.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,999.10 : 163,377.15 = 42,417.10 : x
2. Step 2: Convert to fraction form
   108,999.10/163,377.15 = 42,417.10/x
3. Step 3: Cross multiply
   108,999.10x = 163,377.15 × 42,417.10
4. Step 4: Simplify right side
   108,999.10x = 6,929,984,909.27
5. Step 5: Solve for x
   x = 6,929,984,909.27/108,999.10
6. Step 6: Final answer
   x = 63,578.37