Finding the Third Proportional to 28,479 and 58,780

Step by Step Solution

1. Step 1: Write the proportion equation
   28,479 : 58,780 = 58,780 : x
2. Step 2: Convert to fraction form
   28,479/58,780 = 58,780/x
3. Step 3: Cross multiply
   28,479x = 58,780 × 58,780
4. Step 4: Simplify right side
   28,479x = 3,455,088,400
5. Step 5: Solve for x
   x = 3,455,088,400/28,479
6. Step 6: Final answer
   x = 121,320.57