Finding the Fourth Proportional to 111,817.50, 154,308.15 and 61,515.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,817.50 : 154,308.15 = 61,515.42 : x
2. Step 2: Convert to fraction form
   111,817.50/154,308.15 = 61,515.42/x
3. Step 3: Cross multiply
   111,817.50x = 154,308.15 × 61,515.42
4. Step 4: Simplify right side
   111,817.50x = 9,492,330,656.67
5. Step 5: Solve for x
   x = 9,492,330,656.67/111,817.50
6. Step 6: Final answer
   x = 84,891.28