Finding the Third Proportional to 231,700.50 and 358,191

Step by Step Solution

1. Step 1: Write the proportion equation
   231,700.50 : 358,191 = 358,191 : x
2. Step 2: Convert to fraction form
   231,700.50/358,191 = 358,191/x
3. Step 3: Cross multiply
   231,700.50x = 358,191 × 358,191
4. Step 4: Simplify right side
   231,700.50x = 128,300,792,481
5. Step 5: Solve for x
   x = 128,300,792,481/231,700.50
6. Step 6: Final answer
   x = 553,735.50