Finding the Third Proportional to 21,426.19 and 28,810.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,426.19 : 28,810.69 = 28,810.69 : x
2. Step 2: Convert to fraction form
   21,426.19/28,810.69 = 28,810.69/x
3. Step 3: Cross multiply
   21,426.19x = 28,810.69 × 28,810.69
4. Step 4: Simplify right side
   21,426.19x = 830,055,714.22
5. Step 5: Solve for x
   x = 830,055,714.22/21,426.19
6. Step 6: Final answer
   x = 38,740.24