Finding the Third Proportional to 201,429 and 291,300.75

Step by Step Solution

1. Step 1: Write the proportion equation
   201,429 : 291,300.75 = 291,300.75 : x
2. Step 2: Convert to fraction form
   201,429/291,300.75 = 291,300.75/x
3. Step 3: Cross multiply
   201,429x = 291,300.75 × 291,300.75
4. Step 4: Simplify right side
   201,429x = 84,856,126,950.56
5. Step 5: Solve for x
   x = 84,856,126,950.56/201,429
6. Step 6: Final answer
   x = 421,270.66