Finding the Third Proportional to 642,276 and 1,000,178

Step by Step Solution

1. Step 1: Write the proportion equation
   642,276 : 1,000,178 = 1,000,178 : x
2. Step 2: Convert to fraction form
   642,276/1,000,178 = 1,000,178/x
3. Step 3: Cross multiply
   642,276x = 1,000,178 × 1,000,178
4. Step 4: Simplify right side
   642,276x = 1,000,356,031,684
5. Step 5: Solve for x
   x = 1,000,356,031,684/642,276
6. Step 6: Final answer
   x = 1,557,517.38