Finding the Third Proportional to 98,415 and 209,131.88

Step by Step Solution

1. Step 1: Write the proportion equation
   98,415 : 209,131.88 = 209,131.88 : x
2. Step 2: Convert to fraction form
   98,415/209,131.88 = 209,131.88/x
3. Step 3: Cross multiply
   98,415x = 209,131.88 × 209,131.88
4. Step 4: Simplify right side
   98,415x = 43,736,141,141.02
5. Step 5: Solve for x
   x = 43,736,141,141.02/98,415
6. Step 6: Final answer
   x = 444,405.23