Finding the Fourth Proportional to 140,308.24, 210,514.20 and 51,619.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,308.24 : 210,514.20 = 51,619.72 : x
2. Step 2: Convert to fraction form
   140,308.24/210,514.20 = 51,619.72/x
3. Step 3: Cross multiply
   140,308.24x = 210,514.20 × 51,619.72
4. Step 4: Simplify right side
   140,308.24x = 10,866,684,060.02
5. Step 5: Solve for x
   x = 10,866,684,060.02/140,308.24
6. Step 6: Final answer
   x = 77,448.65