Finding the Third Proportional to 583,186.50 and 912,870

Step by Step Solution

1. Step 1: Write the proportion equation
   583,186.50 : 912,870 = 912,870 : x
2. Step 2: Convert to fraction form
   583,186.50/912,870 = 912,870/x
3. Step 3: Cross multiply
   583,186.50x = 912,870 × 912,870
4. Step 4: Simplify right side
   583,186.50x = 833,331,636,900
5. Step 5: Solve for x
   x = 833,331,636,900/583,186.50
6. Step 6: Final answer
   x = 1,428,928.20