Finding the Third Proportional to 28,278 and 42,480

Step by Step Solution

1. Step 1: Write the proportion equation
   28,278 : 42,480 = 42,480 : x
2. Step 2: Convert to fraction form
   28,278/42,480 = 42,480/x
3. Step 3: Cross multiply
   28,278x = 42,480 × 42,480
4. Step 4: Simplify right side
   28,278x = 1,804,550,400
5. Step 5: Solve for x
   x = 1,804,550,400/28,278
6. Step 6: Final answer
   x = 63,814.64