Finding the Fourth Proportional to 111,855.72, 154,367.28 and 64,117.04

Step by Step Solution

1. Step 1: Write the proportion equation
   111,855.72 : 154,367.28 = 64,117.04 : x
2. Step 2: Convert to fraction form
   111,855.72/154,367.28 = 64,117.04/x
3. Step 3: Cross multiply
   111,855.72x = 154,367.28 × 64,117.04
4. Step 4: Simplify right side
   111,855.72x = 9,897,573,066.45
5. Step 5: Solve for x
   x = 9,897,573,066.45/111,855.72
6. Step 6: Final answer
   x = 88,485.18