Finding the Third Proportional to 136,422 and 291,789

Step by Step Solution

1. Step 1: Write the proportion equation
   136,422 : 291,789 = 291,789 : x
2. Step 2: Convert to fraction form
   136,422/291,789 = 291,789/x
3. Step 3: Cross multiply
   136,422x = 291,789 × 291,789
4. Step 4: Simplify right side
   136,422x = 85,140,820,521
5. Step 5: Solve for x
   x = 85,140,820,521/136,422
6. Step 6: Final answer
   x = 624,098.90