Finding the Third Proportional to 137,608.50 and 279,088.50

Step by Step Solution

1. Step 1: Write the proportion equation
   137,608.50 : 279,088.50 = 279,088.50 : x
2. Step 2: Convert to fraction form
   137,608.50/279,088.50 = 279,088.50/x
3. Step 3: Cross multiply
   137,608.50x = 279,088.50 × 279,088.50
4. Step 4: Simplify right side
   137,608.50x = 77,890,390,832.25
5. Step 5: Solve for x
   x = 77,890,390,832.25/137,608.50
6. Step 6: Final answer
   x = 566,028.92