Finding the Third Proportional to 66,430.50 and 98,699.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,430.50 : 98,699.50 = 98,699.50 : x
2. Step 2: Convert to fraction form
   66,430.50/98,699.50 = 98,699.50/x
3. Step 3: Cross multiply
   66,430.50x = 98,699.50 × 98,699.50
4. Step 4: Simplify right side
   66,430.50x = 9,741,591,300.25
5. Step 5: Solve for x
   x = 9,741,591,300.25/66,430.50
6. Step 6: Final answer
   x = 146,643.35