Finding the Fourth Proportional to 143,388.68, 215,111.72 and 80,298.52

Step by Step Solution

1. Step 1: Write the proportion equation
   143,388.68 : 215,111.72 = 80,298.52 : x
2. Step 2: Convert to fraction form
   143,388.68/215,111.72 = 80,298.52/x
3. Step 3: Cross multiply
   143,388.68x = 215,111.72 × 80,298.52
4. Step 4: Simplify right side
   143,388.68x = 17,273,152,413.62
5. Step 5: Solve for x
   x = 17,273,152,413.62/143,388.68
6. Step 6: Final answer
   x = 120,463.85