Finding the Third Proportional to 28,040 and 42,060

Step by Step Solution

1. Step 1: Write the proportion equation
   28,040 : 42,060 = 42,060 : x
2. Step 2: Convert to fraction form
   28,040/42,060 = 42,060/x
3. Step 3: Cross multiply
   28,040x = 42,060 × 42,060
4. Step 4: Simplify right side
   28,040x = 1,769,043,600
5. Step 5: Solve for x
   x = 1,769,043,600/28,040
6. Step 6: Final answer
   x = 63,090