Finding the Third Proportional to 42,192 and 57,240

Step by Step Solution

1. Step 1: Write the proportion equation
   42,192 : 57,240 = 57,240 : x
2. Step 2: Convert to fraction form
   42,192/57,240 = 57,240/x
3. Step 3: Cross multiply
   42,192x = 57,240 × 57,240
4. Step 4: Simplify right side
   42,192x = 3,276,417,600
5. Step 5: Solve for x
   x = 3,276,417,600/42,192
6. Step 6: Final answer
   x = 77,654.95