Finding the Third Proportional to 658,790 and 1,438,056

Step by Step Solution

1. Step 1: Write the proportion equation
   658,790 : 1,438,056 = 1,438,056 : x
2. Step 2: Convert to fraction form
   658,790/1,438,056 = 1,438,056/x
3. Step 3: Cross multiply
   658,790x = 1,438,056 × 1,438,056
4. Step 4: Simplify right side
   658,790x = 2,068,005,059,136
5. Step 5: Solve for x
   x = 2,068,005,059,136/658,790
6. Step 6: Final answer
   x = 3,139,096.01