Finding the Fourth Proportional to 72,152.95, 99,569.35 and 40,328

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.95 : 99,569.35 = 40,328 : x
2. Step 2: Convert to fraction form
   72,152.95/99,569.35 = 40,328/x
3. Step 3: Cross multiply
   72,152.95x = 99,569.35 × 40,328
4. Step 4: Simplify right side
   72,152.95x = 4,015,432,746.80
5. Step 5: Solve for x
   x = 4,015,432,746.80/72,152.95
6. Step 6: Final answer
   x = 55,651.68