Finding the Third Proportional to 13,311.84 and 21,387.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.84 : 21,387.80 = 21,387.80 : x
2. Step 2: Convert to fraction form
   13,311.84/21,387.80 = 21,387.80/x
3. Step 3: Cross multiply
   13,311.84x = 21,387.80 × 21,387.80
4. Step 4: Simplify right side
   13,311.84x = 457,437,855.17
5. Step 5: Solve for x
   x = 457,437,855.17/13,311.84
6. Step 6: Final answer
   x = 34,363.22