Finding the Third Proportional to 66,490.50 and 99,736.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,490.50 : 99,736.50 = 99,736.50 : x
2. Step 2: Convert to fraction form
   66,490.50/99,736.50 = 99,736.50/x
3. Step 3: Cross multiply
   66,490.50x = 99,736.50 × 99,736.50
4. Step 4: Simplify right side
   66,490.50x = 9,947,369,432.25
5. Step 5: Solve for x
   x = 9,947,369,432.25/66,490.50
6. Step 6: Final answer
   x = 149,605.88