Finding the Fourth Proportional to 111,789.78, 154,291.80 and 64,075.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,789.78 : 154,291.80 = 64,075.10 : x
2. Step 2: Convert to fraction form
   111,789.78/154,291.80 = 64,075.10/x
3. Step 3: Cross multiply
   111,789.78x = 154,291.80 × 64,075.10
4. Step 4: Simplify right side
   111,789.78x = 9,886,262,514.18
5. Step 5: Solve for x
   x = 9,886,262,514.18/111,789.78
6. Step 6: Final answer
   x = 88,436.19