Finding the Third Proportional to 9,666.42 and 21,200.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,666.42 : 21,200.91 = 21,200.91 : x
2. Step 2: Convert to fraction form
   9,666.42/21,200.91 = 21,200.91/x
3. Step 3: Cross multiply
   9,666.42x = 21,200.91 × 21,200.91
4. Step 4: Simplify right side
   9,666.42x = 449,478,425.82
5. Step 5: Solve for x
   x = 449,478,425.82/9,666.42
6. Step 6: Final answer
   x = 46,498.95