Finding the Fourth Proportional to 143,386.74, 215,108.80 and 80,296.56

Step by Step Solution

1. Step 1: Write the proportion equation
   143,386.74 : 215,108.80 = 80,296.56 : x
2. Step 2: Convert to fraction form
   143,386.74/215,108.80 = 80,296.56/x
3. Step 3: Cross multiply
   143,386.74x = 215,108.80 × 80,296.56
4. Step 4: Simplify right side
   143,386.74x = 17,272,496,665.73
5. Step 5: Solve for x
   x = 17,272,496,665.73/143,386.74
6. Step 6: Final answer
   x = 120,460.91