Finding the Third Proportional to 231,990 and 348,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,990 : 348,601.50 = 348,601.50 : x
2. Step 2: Convert to fraction form
   231,990/348,601.50 = 348,601.50/x
3. Step 3: Cross multiply
   231,990x = 348,601.50 × 348,601.50
4. Step 4: Simplify right side
   231,990x = 121,523,005,802.25
5. Step 5: Solve for x
   x = 121,523,005,802.25/231,990
6. Step 6: Final answer
   x = 523,828.64