Finding the Third Proportional to 868,509 and 1,913,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   868,509 : 1,913,710.50 = 1,913,710.50 : x
2. Step 2: Convert to fraction form
   868,509/1,913,710.50 = 1,913,710.50/x
3. Step 3: Cross multiply
   868,509x = 1,913,710.50 × 1,913,710.50
4. Step 4: Simplify right side
   868,509x = 3,662,287,877,810.25
5. Step 5: Solve for x
   x = 3,662,287,877,810.25/868,509
6. Step 6: Final answer
   x = 4,216,752.94