Finding the Fourth Proportional to 111,630.72, 154,049.28 and 61,328.64

Step by Step Solution

1. Step 1: Write the proportion equation
   111,630.72 : 154,049.28 = 61,328.64 : x
2. Step 2: Convert to fraction form
   111,630.72/154,049.28 = 61,328.64/x
3. Step 3: Cross multiply
   111,630.72x = 154,049.28 × 61,328.64
4. Step 4: Simplify right side
   111,630.72x = 9,447,632,835.38
5. Step 5: Solve for x
   x = 9,447,632,835.38/111,630.72
6. Step 6: Final answer
   x = 84,632.91