Finding the Third Proportional to 231,772.50 and 358,830

Step by Step Solution

1. Step 1: Write the proportion equation
   231,772.50 : 358,830 = 358,830 : x
2. Step 2: Convert to fraction form
   231,772.50/358,830 = 358,830/x
3. Step 3: Cross multiply
   231,772.50x = 358,830 × 358,830
4. Step 4: Simplify right side
   231,772.50x = 128,758,968,900
5. Step 5: Solve for x
   x = 128,758,968,900/231,772.50
6. Step 6: Final answer
   x = 555,540.32