Finding the Third Proportional to 136,142 and 299,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,142 : 299,426.50 = 299,426.50 : x
2. Step 2: Convert to fraction form
   136,142/299,426.50 = 299,426.50/x
3. Step 3: Cross multiply
   136,142x = 299,426.50 × 299,426.50
4. Step 4: Simplify right side
   136,142x = 89,656,228,902.25
5. Step 5: Solve for x
   x = 89,656,228,902.25/136,142
6. Step 6: Final answer
   x = 658,549.37