Finding the Fourth Proportional to 111,890.95, 154,404.96 and 64,111.07

Step by Step Solution

1. Step 1: Write the proportion equation
   111,890.95 : 154,404.96 = 64,111.07 : x
2. Step 2: Convert to fraction form
   111,890.95/154,404.96 = 64,111.07/x
3. Step 3: Cross multiply
   111,890.95x = 154,404.96 × 64,111.07
4. Step 4: Simplify right side
   111,890.95x = 9,899,067,198.91
5. Step 5: Solve for x
   x = 9,899,067,198.91/111,890.95
6. Step 6: Final answer
   x = 88,470.67