Finding the Third Proportional to 428,658 and 931,188

Step by Step Solution

1. Step 1: Write the proportion equation
   428,658 : 931,188 = 931,188 : x
2. Step 2: Convert to fraction form
   428,658/931,188 = 931,188/x
3. Step 3: Cross multiply
   428,658x = 931,188 × 931,188
4. Step 4: Simplify right side
   428,658x = 867,111,091,344
5. Step 5: Solve for x
   x = 867,111,091,344/428,658
6. Step 6: Final answer
   x = 2,022,850.60