Finding the Third Proportional to 99,557.50 and 218,798

Step by Step Solution

1. Step 1: Write the proportion equation
   99,557.50 : 218,798 = 218,798 : x
2. Step 2: Convert to fraction form
   99,557.50/218,798 = 218,798/x
3. Step 3: Cross multiply
   99,557.50x = 218,798 × 218,798
4. Step 4: Simplify right side
   99,557.50x = 47,872,564,804
5. Step 5: Solve for x
   x = 47,872,564,804/99,557.50
6. Step 6: Final answer
   x = 480,853.42