Finding the Third Proportional to 21,090.88 and 45,872.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,090.88 : 45,872.50 = 45,872.50 : x
2. Step 2: Convert to fraction form
   21,090.88/45,872.50 = 45,872.50/x
3. Step 3: Cross multiply
   21,090.88x = 45,872.50 × 45,872.50
4. Step 4: Simplify right side
   21,090.88x = 2,104,286,256.25
5. Step 5: Solve for x
   x = 2,104,286,256.25/21,090.88
6. Step 6: Final answer
   x = 99,772.35