Finding the Third Proportional to 553,648.50 and 830,475

Step by Step Solution

1. Step 1: Write the proportion equation
   553,648.50 : 830,475 = 830,475 : x
2. Step 2: Convert to fraction form
   553,648.50/830,475 = 830,475/x
3. Step 3: Cross multiply
   553,648.50x = 830,475 × 830,475
4. Step 4: Simplify right side
   553,648.50x = 689,688,725,625
5. Step 5: Solve for x
   x = 689,688,725,625/553,648.50
6. Step 6: Final answer
   x = 1,245,715.88