Finding the Fourth Proportional to 111,886.50, 154,403.31 and 61,585.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,886.50 : 154,403.31 = 61,585.50 : x
2. Step 2: Convert to fraction form
   111,886.50/154,403.31 = 61,585.50/x
3. Step 3: Cross multiply
   111,886.50x = 154,403.31 × 61,585.50
4. Step 4: Simplify right side
   111,886.50x = 9,509,005,048.01
5. Step 5: Solve for x
   x = 9,509,005,048.01/111,886.50
6. Step 6: Final answer
   x = 84,987.96