Finding the Fourth Proportional to 108,659.30, 162,600.15 and 99,328.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,659.30 : 162,600.15 = 99,328.10 : x
2. Step 2: Convert to fraction form
   108,659.30/162,600.15 = 99,328.10/x
3. Step 3: Cross multiply
   108,659.30x = 162,600.15 × 99,328.10
4. Step 4: Simplify right side
   108,659.30x = 16,150,763,959.22
5. Step 5: Solve for x
   x = 16,150,763,959.22/108,659.30
6. Step 6: Final answer
   x = 148,636.74