Finding the Third Proportional to 643,034.95 and 986,788.83

Step by Step Solution

1. Step 1: Write the proportion equation
   643,034.95 : 986,788.83 = 986,788.83 : x
2. Step 2: Convert to fraction form
   643,034.95/986,788.83 = 986,788.83/x
3. Step 3: Cross multiply
   643,034.95x = 986,788.83 × 986,788.83
4. Step 4: Simplify right side
   643,034.95x = 973,752,191,312.31
5. Step 5: Solve for x
   x = 973,752,191,312.31/643,034.95
6. Step 6: Final answer
   x = 1,514,306.78