Finding the Fourth Proportional to 72,569.15, 108,895.75 and 30,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,569.15 : 108,895.75 = 30,445.50 : x
2. Step 2: Convert to fraction form
   72,569.15/108,895.75 = 30,445.50/x
3. Step 3: Cross multiply
   72,569.15x = 108,895.75 × 30,445.50
4. Step 4: Simplify right side
   72,569.15x = 3,315,385,480.51
5. Step 5: Solve for x
   x = 3,315,385,480.51/72,569.15
6. Step 6: Final answer
   x = 45,685.88