Finding the Fourth Proportional to 72,283.32, 99,748.84 and 40,019.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,283.32 : 99,748.84 = 40,019.38 : x
2. Step 2: Convert to fraction form
   72,283.32/99,748.84 = 40,019.38/x
3. Step 3: Cross multiply
   72,283.32x = 99,748.84 × 40,019.38
4. Step 4: Simplify right side
   72,283.32x = 3,991,886,133.73
5. Step 5: Solve for x
   x = 3,991,886,133.73/72,283.32
6. Step 6: Final answer
   x = 55,225.55