Finding the Fourth Proportional to 99,288.78, 148,576.41 and 72,928.14

Step by Step Solution

1. Step 1: Write the proportion equation
   99,288.78 : 148,576.41 = 72,928.14 : x
2. Step 2: Convert to fraction form
   99,288.78/148,576.41 = 72,928.14/x
3. Step 3: Cross multiply
   99,288.78x = 148,576.41 × 72,928.14
4. Step 4: Simplify right side
   99,288.78x = 10,835,401,229.18
5. Step 5: Solve for x
   x = 10,835,401,229.18/99,288.78
6. Step 6: Final answer
   x = 109,130.17