Finding the Fourth Proportional to 111,789.52, 154,252.56 and 63,388.78

Step by Step Solution

1. Step 1: Write the proportion equation
   111,789.52 : 154,252.56 = 63,388.78 : x
2. Step 2: Convert to fraction form
   111,789.52/154,252.56 = 63,388.78/x
3. Step 3: Cross multiply
   111,789.52x = 154,252.56 × 63,388.78
4. Step 4: Simplify right side
   111,789.52x = 9,777,881,590.28
5. Step 5: Solve for x
   x = 9,777,881,590.28/111,789.52
6. Step 6: Final answer
   x = 87,466.89