Finding the Fourth Proportional to 309,023.10, 463,445.37 and 140,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,023.10 : 463,445.37 = 140,449.50 : x
2. Step 2: Convert to fraction form
   309,023.10/463,445.37 = 140,449.50/x
3. Step 3: Cross multiply
   309,023.10x = 463,445.37 × 140,449.50
4. Step 4: Simplify right side
   309,023.10x = 65,090,670,493.82
5. Step 5: Solve for x
   x = 65,090,670,493.82/309,023.10
6. Step 6: Final answer
   x = 210,633.67