Finding the Fourth Proportional to 111,451.50, 153,805.77 and 61,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,451.50 : 153,805.77 = 61,150.50 : x
2. Step 2: Convert to fraction form
   111,451.50/153,805.77 = 61,150.50/x
3. Step 3: Cross multiply
   111,451.50x = 153,805.77 × 61,150.50
4. Step 4: Simplify right side
   111,451.50x = 9,405,299,738.39
5. Step 5: Solve for x
   x = 9,405,299,738.39/111,451.50
6. Step 6: Final answer
   x = 84,389.17