Finding the Third Proportional to 89,977.50 and 129,600

Step by Step Solution

1. Step 1: Write the proportion equation
   89,977.50 : 129,600 = 129,600 : x
2. Step 2: Convert to fraction form
   89,977.50/129,600 = 129,600/x
3. Step 3: Cross multiply
   89,977.50x = 129,600 × 129,600
4. Step 4: Simplify right side
   89,977.50x = 16,796,160,000
5. Step 5: Solve for x
   x = 16,796,160,000/89,977.50
6. Step 6: Final answer
   x = 186,670.67