Finding the Third Proportional to 619,302 and 872,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   619,302 : 872,089.50 = 872,089.50 : x
2. Step 2: Convert to fraction form
   619,302/872,089.50 = 872,089.50/x
3. Step 3: Cross multiply
   619,302x = 872,089.50 × 872,089.50
4. Step 4: Simplify right side
   619,302x = 760,540,096,010.25
5. Step 5: Solve for x
   x = 760,540,096,010.25/619,302
6. Step 6: Final answer
   x = 1,228,060.13