Finding the Fourth Proportional to 69,074.90, 103,689.15 and 42,809.30

Step by Step Solution

1. Step 1: Write the proportion equation
   69,074.90 : 103,689.15 = 42,809.30 : x
2. Step 2: Convert to fraction form
   69,074.90/103,689.15 = 42,809.30/x
3. Step 3: Cross multiply
   69,074.90x = 103,689.15 × 42,809.30
4. Step 4: Simplify right side
   69,074.90x = 4,438,859,929.10
5. Step 5: Solve for x
   x = 4,438,859,929.10/69,074.90
6. Step 6: Final answer
   x = 64,261.55