Finding the Fourth Proportional to 69,078.90, 103,695.15 and 42,813.30

Step by Step Solution

1. Step 1: Write the proportion equation
   69,078.90 : 103,695.15 = 42,813.30 : x
2. Step 2: Convert to fraction form
   69,078.90/103,695.15 = 42,813.30/x
3. Step 3: Cross multiply
   69,078.90x = 103,695.15 × 42,813.30
4. Step 4: Simplify right side
   69,078.90x = 4,439,531,565.50
5. Step 5: Solve for x
   x = 4,439,531,565.50/69,078.90
6. Step 6: Final answer
   x = 64,267.55