Finding the Third Proportional to 156,948 and 343,040

Step by Step Solution

1. Step 1: Write the proportion equation
   156,948 : 343,040 = 343,040 : x
2. Step 2: Convert to fraction form
   156,948/343,040 = 343,040/x
3. Step 3: Cross multiply
   156,948x = 343,040 × 343,040
4. Step 4: Simplify right side
   156,948x = 117,676,441,600
5. Step 5: Solve for x
   x = 117,676,441,600/156,948
6. Step 6: Final answer
   x = 749,779.81