Finding the Fourth Proportional to 72,156.81, 99,574.58 and 40,325.94

Step by Step Solution

1. Step 1: Write the proportion equation
   72,156.81 : 99,574.58 = 40,325.94 : x
2. Step 2: Convert to fraction form
   72,156.81/99,574.58 = 40,325.94/x
3. Step 3: Cross multiply
   72,156.81x = 99,574.58 × 40,325.94
4. Step 4: Simplify right side
   72,156.81x = 4,015,438,538.61
5. Step 5: Solve for x
   x = 4,015,438,538.61/72,156.81
6. Step 6: Final answer
   x = 55,648.78