Finding the Third Proportional to 18,085.78 and 40,320.28

Step by Step Solution

1. Step 1: Write the proportion equation
   18,085.78 : 40,320.28 = 40,320.28 : x
2. Step 2: Convert to fraction form
   18,085.78/40,320.28 = 40,320.28/x
3. Step 3: Cross multiply
   18,085.78x = 40,320.28 × 40,320.28
4. Step 4: Simplify right side
   18,085.78x = 1,625,725,080.08
5. Step 5: Solve for x
   x = 1,625,725,080.08/18,085.78
6. Step 6: Final answer
   x = 89,889.68