Finding the Third Proportional to 638,294 and 988,298.25

Step by Step Solution

1. Step 1: Write the proportion equation
   638,294 : 988,298.25 = 988,298.25 : x
2. Step 2: Convert to fraction form
   638,294/988,298.25 = 988,298.25/x
3. Step 3: Cross multiply
   638,294x = 988,298.25 × 988,298.25
4. Step 4: Simplify right side
   638,294x = 976,733,430,953.06
5. Step 5: Solve for x
   x = 976,733,430,953.06/638,294
6. Step 6: Final answer
   x = 1,530,224.99