Finding the Fourth Proportional to 72,225.56, 99,680.67 and 40,401.06

Step by Step Solution

1. Step 1: Write the proportion equation
   72,225.56 : 99,680.67 = 40,401.06 : x
2. Step 2: Convert to fraction form
   72,225.56/99,680.67 = 40,401.06/x
3. Step 3: Cross multiply
   72,225.56x = 99,680.67 × 40,401.06
4. Step 4: Simplify right side
   72,225.56x = 4,027,204,729.51
5. Step 5: Solve for x
   x = 4,027,204,729.51/72,225.56
6. Step 6: Final answer
   x = 55,758.72