Finding the Third Proportional to 112,869.50 and 266,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,869.50 : 266,428.50 = 266,428.50 : x
2. Step 2: Convert to fraction form
   112,869.50/266,428.50 = 266,428.50/x
3. Step 3: Cross multiply
   112,869.50x = 266,428.50 × 266,428.50
4. Step 4: Simplify right side
   112,869.50x = 70,984,145,612.25
5. Step 5: Solve for x
   x = 70,984,145,612.25/112,869.50
6. Step 6: Final answer
   x = 628,904.58