Finding the Third Proportional to 387,139.50 and 849,001.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,139.50 : 849,001.50 = 849,001.50 : x
2. Step 2: Convert to fraction form
   387,139.50/849,001.50 = 849,001.50/x
3. Step 3: Cross multiply
   387,139.50x = 849,001.50 × 849,001.50
4. Step 4: Simplify right side
   387,139.50x = 720,803,547,002.25
5. Step 5: Solve for x
   x = 720,803,547,002.25/387,139.50
6. Step 6: Final answer
   x = 1,861,870.33