Finding the Fourth Proportional to 143,384.73, 215,105.80 and 80,294.57

Step by Step Solution

1. Step 1: Write the proportion equation
   143,384.73 : 215,105.80 = 80,294.57 : x
2. Step 2: Convert to fraction form
   143,384.73/215,105.80 = 80,294.57/x
3. Step 3: Cross multiply
   143,384.73x = 215,105.80 × 80,294.57
4. Step 4: Simplify right side
   143,384.73x = 17,271,827,017.28
5. Step 5: Solve for x
   x = 17,271,827,017.28/143,384.73
6. Step 6: Final answer
   x = 120,457.92