Finding the Fourth Proportional to 140,020.30, 210,006.15 and 51,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   140,020.30 : 210,006.15 = 51,228.10 : x
2. Step 2: Convert to fraction form
   140,020.30/210,006.15 = 51,228.10/x
3. Step 3: Cross multiply
   140,020.30x = 210,006.15 × 51,228.10
4. Step 4: Simplify right side
   140,020.30x = 10,758,216,052.82
5. Step 5: Solve for x
   x = 10,758,216,052.82/140,020.30
6. Step 6: Final answer
   x = 76,833.26