Finding the Fourth Proportional to 111,791.78, 154,294.56 and 64,077.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,791.78 : 154,294.56 = 64,077.10 : x
2. Step 2: Convert to fraction form
   111,791.78/154,294.56 = 64,077.10/x
3. Step 3: Cross multiply
   111,791.78x = 154,294.56 × 64,077.10
4. Step 4: Simplify right side
   111,791.78x = 9,886,747,950.58
5. Step 5: Solve for x
   x = 9,886,747,950.58/111,791.78
6. Step 6: Final answer
   x = 88,438.95