Finding the Fourth Proportional to 111,643.88, 154,068.55 and 61,342.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111,643.88 : 154,068.55 = 61,342.88 : x
2. Step 2: Convert to fraction form
   111,643.88/154,068.55 = 61,342.88/x
3. Step 3: Cross multiply
   111,643.88x = 154,068.55 × 61,342.88
4. Step 4: Simplify right side
   111,643.88x = 9,451,007,650.72
5. Step 5: Solve for x
   x = 9,451,007,650.72/111,643.88
6. Step 6: Final answer
   x = 84,653.17