Finding the Third Proportional to 638,118 and 987,946.88

Step by Step Solution

1. Step 1: Write the proportion equation
   638,118 : 987,946.88 = 987,946.88 : x
2. Step 2: Convert to fraction form
   638,118/987,946.88 = 987,946.88/x
3. Step 3: Cross multiply
   638,118x = 987,946.88 × 987,946.88
4. Step 4: Simplify right side
   638,118x = 976,039,027,822.27
5. Step 5: Solve for x
   x = 976,039,027,822.27/638,118
6. Step 6: Final answer
   x = 1,529,558.84