Finding the Third Proportional to 316,404.98 and 490,055.06

Step by Step Solution

1. Step 1: Write the proportion equation
   316,404.98 : 490,055.06 = 490,055.06 : x
2. Step 2: Convert to fraction form
   316,404.98/490,055.06 = 490,055.06/x
3. Step 3: Cross multiply
   316,404.98x = 490,055.06 × 490,055.06
4. Step 4: Simplify right side
   316,404.98x = 240,153,964,281.88
5. Step 5: Solve for x
   x = 240,153,964,281.88/316,404.98
6. Step 6: Final answer
   x = 759,008.16