Finding the Third Proportional to 156,156 and 247,020

Step by Step Solution

1. Step 1: Write the proportion equation
   156,156 : 247,020 = 247,020 : x
2. Step 2: Convert to fraction form
   156,156/247,020 = 247,020/x
3. Step 3: Cross multiply
   156,156x = 247,020 × 247,020
4. Step 4: Simplify right side
   156,156x = 61,018,880,400
5. Step 5: Solve for x
   x = 61,018,880,400/156,156
6. Step 6: Final answer
   x = 390,755.91