Finding the Third Proportional to 42,572 and 90,520

Step by Step Solution

1. Step 1: Write the proportion equation
   42,572 : 90,520 = 90,520 : x
2. Step 2: Convert to fraction form
   42,572/90,520 = 90,520/x
3. Step 3: Cross multiply
   42,572x = 90,520 × 90,520
4. Step 4: Simplify right side
   42,572x = 8,193,870,400
5. Step 5: Solve for x
   x = 8,193,870,400/42,572
6. Step 6: Final answer
   x = 192,470.88