Finding the Third Proportional to 99,809.50 and 153,845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,809.50 : 153,845.50 = 153,845.50 : x
2. Step 2: Convert to fraction form
   99,809.50/153,845.50 = 153,845.50/x
3. Step 3: Cross multiply
   99,809.50x = 153,845.50 × 153,845.50
4. Step 4: Simplify right side
   99,809.50x = 23,668,437,870.25
5. Step 5: Solve for x
   x = 23,668,437,870.25/99,809.50
6. Step 6: Final answer
   x = 237,136.12