Finding the Third Proportional to 28,726 and 42,143

Step by Step Solution

1. Step 1: Write the proportion equation
   28,726 : 42,143 = 42,143 : x
2. Step 2: Convert to fraction form
   28,726/42,143 = 42,143/x
3. Step 3: Cross multiply
   28,726x = 42,143 × 42,143
4. Step 4: Simplify right side
   28,726x = 1,776,032,449
5. Step 5: Solve for x
   x = 1,776,032,449/28,726
6. Step 6: Final answer
   x = 61,826.65