Finding the Third Proportional to 395,916.50 and 864,431

Step by Step Solution

1. Step 1: Write the proportion equation
   395,916.50 : 864,431 = 864,431 : x
2. Step 2: Convert to fraction form
   395,916.50/864,431 = 864,431/x
3. Step 3: Cross multiply
   395,916.50x = 864,431 × 864,431
4. Step 4: Simplify right side
   395,916.50x = 747,240,953,761
5. Step 5: Solve for x
   x = 747,240,953,761/395,916.50
6. Step 6: Final answer
   x = 1,887,370.07