Finding the Fourth Proportional to 144,468.78, 199,368.18 and 80,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,468.78 : 199,368.18 = 80,812.50 : x
2. Step 2: Convert to fraction form
   144,468.78/199,368.18 = 80,812.50/x
3. Step 3: Cross multiply
   144,468.78x = 199,368.18 × 80,812.50
4. Step 4: Simplify right side
   144,468.78x = 16,111,441,046.25
5. Step 5: Solve for x
   x = 16,111,441,046.25/144,468.78
6. Step 6: Final answer
   x = 111,521.96