Finding the Third Proportional to 136,308 and 279,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,308 : 279,415.50 = 279,415.50 : x
2. Step 2: Convert to fraction form
   136,308/279,415.50 = 279,415.50/x
3. Step 3: Cross multiply
   136,308x = 279,415.50 × 279,415.50
4. Step 4: Simplify right side
   136,308x = 78,073,021,640.25
5. Step 5: Solve for x
   x = 78,073,021,640.25/136,308
6. Step 6: Final answer
   x = 572,769.18