Finding the Third Proportional to 31,225.50 and 67,435.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,225.50 : 67,435.88 = 67,435.88 : x
2. Step 2: Convert to fraction form
   31,225.50/67,435.88 = 67,435.88/x
3. Step 3: Cross multiply
   31,225.50x = 67,435.88 × 67,435.88
4. Step 4: Simplify right side
   31,225.50x = 4,547,597,237.02
5. Step 5: Solve for x
   x = 4,547,597,237.02/31,225.50
6. Step 6: Final answer
   x = 145,637.29