Finding the Third Proportional to 66,519 and 99,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,519 : 99,490.50 = 99,490.50 : x
2. Step 2: Convert to fraction form
   66,519/99,490.50 = 99,490.50/x
3. Step 3: Cross multiply
   66,519x = 99,490.50 × 99,490.50
4. Step 4: Simplify right side
   66,519x = 9,898,359,590.25
5. Step 5: Solve for x
   x = 9,898,359,590.25/66,519
6. Step 6: Final answer
   x = 148,805.00