Finding the Third Proportional to 28,572 and 42,830

Step by Step Solution

1. Step 1: Write the proportion equation
   28,572 : 42,830 = 42,830 : x
2. Step 2: Convert to fraction form
   28,572/42,830 = 42,830/x
3. Step 3: Cross multiply
   28,572x = 42,830 × 42,830
4. Step 4: Simplify right side
   28,572x = 1,834,408,900
5. Step 5: Solve for x
   x = 1,834,408,900/28,572
6. Step 6: Final answer
   x = 64,203.03