Finding the Third Proportional to 9,876.94 and 21,432.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,876.94 : 21,432.09 = 21,432.09 : x
2. Step 2: Convert to fraction form
   9,876.94/21,432.09 = 21,432.09/x
3. Step 3: Cross multiply
   9,876.94x = 21,432.09 × 21,432.09
4. Step 4: Simplify right side
   9,876.94x = 459,334,642.51
5. Step 5: Solve for x
   x = 459,334,642.51/9,876.94
6. Step 6: Final answer
   x = 46,505.78