Finding the Third Proportional to 136,228.50 and 296,978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   136,228.50 : 296,978.63 = 296,978.63 : x
2. Step 2: Convert to fraction form
   136,228.50/296,978.63 = 296,978.63/x
3. Step 3: Cross multiply
   136,228.50x = 296,978.63 × 296,978.63
4. Step 4: Simplify right side
   136,228.50x = 88,196,303,706.89
5. Step 5: Solve for x
   x = 88,196,303,706.89/136,228.50
6. Step 6: Final answer
   x = 647,414.48