Finding the Third Proportional to 199,802.95 and 428,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   199,802.95 : 428,105.25 = 428,105.25 : x
2. Step 2: Convert to fraction form
   199,802.95/428,105.25 = 428,105.25/x
3. Step 3: Cross multiply
   199,802.95x = 428,105.25 × 428,105.25
4. Step 4: Simplify right side
   199,802.95x = 183,274,105,077.56
5. Step 5: Solve for x
   x = 183,274,105,077.56/199,802.95
6. Step 6: Final answer
   x = 917,274.26