Finding the Third Proportional to 156,820 and 342,072

Step by Step Solution

1. Step 1: Write the proportion equation
   156,820 : 342,072 = 342,072 : x
2. Step 2: Convert to fraction form
   156,820/342,072 = 342,072/x
3. Step 3: Cross multiply
   156,820x = 342,072 × 342,072
4. Step 4: Simplify right side
   156,820x = 117,013,253,184
5. Step 5: Solve for x
   x = 117,013,253,184/156,820
6. Step 6: Final answer
   x = 746,162.82