Finding the Fourth Proportional to 140,144.80, 210,174.72 and 51,405.52

Step by Step Solution

1. Step 1: Write the proportion equation
   140,144.80 : 210,174.72 = 51,405.52 : x
2. Step 2: Convert to fraction form
   140,144.80/210,174.72 = 51,405.52/x
3. Step 3: Cross multiply
   140,144.80x = 210,174.72 × 51,405.52
4. Step 4: Simplify right side
   140,144.80x = 10,804,140,772.45
5. Step 5: Solve for x
   x = 10,804,140,772.45/140,144.80
6. Step 6: Final answer
   x = 77,092.70