Finding the Fourth Proportional to 140,242.88, 210,216.69 and 84,113.52

Step by Step Solution

1. Step 1: Write the proportion equation
   140,242.88 : 210,216.69 = 84,113.52 : x
2. Step 2: Convert to fraction form
   140,242.88/210,216.69 = 84,113.52/x
3. Step 3: Cross multiply
   140,242.88x = 210,216.69 × 84,113.52
4. Step 4: Simplify right side
   140,242.88x = 17,682,065,758.65
5. Step 5: Solve for x
   x = 17,682,065,758.65/140,242.88
6. Step 6: Final answer
   x = 126,081.74