Finding the Third Proportional to 156,152 and 248,280

Step by Step Solution

1. Step 1: Write the proportion equation
   156,152 : 248,280 = 248,280 : x
2. Step 2: Convert to fraction form
   156,152/248,280 = 248,280/x
3. Step 3: Cross multiply
   156,152x = 248,280 × 248,280
4. Step 4: Simplify right side
   156,152x = 61,642,958,400
5. Step 5: Solve for x
   x = 61,642,958,400/156,152
6. Step 6: Final answer
   x = 394,762.53