Finding the Third Proportional to 136,356 and 279,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,356 : 279,478.50 = 279,478.50 : x
2. Step 2: Convert to fraction form
   136,356/279,478.50 = 279,478.50/x
3. Step 3: Cross multiply
   136,356x = 279,478.50 × 279,478.50
4. Step 4: Simplify right side
   136,356x = 78,108,231,962.25
5. Step 5: Solve for x
   x = 78,108,231,962.25/136,356
6. Step 6: Final answer
   x = 572,825.78