Finding the Third Proportional to 38,485 and 57,840

Step by Step Solution

1. Step 1: Write the proportion equation
   38,485 : 57,840 = 57,840 : x
2. Step 2: Convert to fraction form
   38,485/57,840 = 57,840/x
3. Step 3: Cross multiply
   38,485x = 57,840 × 57,840
4. Step 4: Simplify right side
   38,485x = 3,345,465,600
5. Step 5: Solve for x
   x = 3,345,465,600/38,485
6. Step 6: Final answer
   x = 86,929.08