Finding the Third Proportional to 619,288.88 and 872,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   619,288.88 : 872,071.31 = 872,071.31 : x
2. Step 2: Convert to fraction form
   619,288.88/872,071.31 = 872,071.31/x
3. Step 3: Cross multiply
   619,288.88x = 872,071.31 × 872,071.31
4. Step 4: Simplify right side
   619,288.88x = 760,508,374,085.47
5. Step 5: Solve for x
   x = 760,508,374,085.47/619,288.88
6. Step 6: Final answer
   x = 1,228,034.94