Finding the Third Proportional to 399,157.88 and 872,066.25

Step by Step Solution

1. Step 1: Write the proportion equation
   399,157.88 : 872,066.25 = 872,066.25 : x
2. Step 2: Convert to fraction form
   399,157.88/872,066.25 = 872,066.25/x
3. Step 3: Cross multiply
   399,157.88x = 872,066.25 × 872,066.25
4. Step 4: Simplify right side
   399,157.88x = 760,499,544,389.06
5. Step 5: Solve for x
   x = 760,499,544,389.06/399,157.88
6. Step 6: Final answer
   x = 1,905,260.03