Finding the Fourth Proportional to 111,515.32, 153,920.64 and 69,049.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,515.32 : 153,920.64 = 69,049.72 : x
2. Step 2: Convert to fraction form
   111,515.32/153,920.64 = 69,049.72/x
3. Step 3: Cross multiply
   111,515.32x = 153,920.64 × 69,049.72
4. Step 4: Simplify right side
   111,515.32x = 10,628,177,094.22
5. Step 5: Solve for x
   x = 10,628,177,094.22/111,515.32
6. Step 6: Final answer
   x = 95,306.88