Finding the Third Proportional to 142,897.50 and 305,478

Step by Step Solution

1. Step 1: Write the proportion equation
   142,897.50 : 305,478 = 305,478 : x
2. Step 2: Convert to fraction form
   142,897.50/305,478 = 305,478/x
3. Step 3: Cross multiply
   142,897.50x = 305,478 × 305,478
4. Step 4: Simplify right side
   142,897.50x = 93,316,808,484
5. Step 5: Solve for x
   x = 93,316,808,484/142,897.50
6. Step 6: Final answer
   x = 653,033.18