Finding the Third Proportional to 111,570 and 156,410

Step by Step Solution

1. Step 1: Write the proportion equation
   111,570 : 156,410 = 156,410 : x
2. Step 2: Convert to fraction form
   111,570/156,410 = 156,410/x
3. Step 3: Cross multiply
   111,570x = 156,410 × 156,410
4. Step 4: Simplify right side
   111,570x = 24,464,088,100
5. Step 5: Solve for x
   x = 24,464,088,100/111,570
6. Step 6: Final answer
   x = 219,271.20