Finding the Third Proportional to 645,617.25 and 947,689.88

Step by Step Solution

1. Step 1: Write the proportion equation
   645,617.25 : 947,689.88 = 947,689.88 : x
2. Step 2: Convert to fraction form
   645,617.25/947,689.88 = 947,689.88/x
3. Step 3: Cross multiply
   645,617.25x = 947,689.88 × 947,689.88
4. Step 4: Simplify right side
   645,617.25x = 898,116,099,177.52
5. Step 5: Solve for x
   x = 898,116,099,177.52/645,617.25
6. Step 6: Final answer
   x = 1,391,096.81