Finding the Third Proportional to 231,808.50 and 358,738.88

Step by Step Solution

1. Step 1: Write the proportion equation
   231,808.50 : 358,738.88 = 358,738.88 : x
2. Step 2: Convert to fraction form
   231,808.50/358,738.88 = 358,738.88/x
3. Step 3: Cross multiply
   231,808.50x = 358,738.88 × 358,738.88
4. Step 4: Simplify right side
   231,808.50x = 128,693,580,436.27
5. Step 5: Solve for x
   x = 128,693,580,436.27/231,808.50
6. Step 6: Final answer
   x = 555,171.96