Finding the Third Proportional to 42,220 and 56,838

Step by Step Solution

1. Step 1: Write the proportion equation
   42,220 : 56,838 = 56,838 : x
2. Step 2: Convert to fraction form
   42,220/56,838 = 56,838/x
3. Step 3: Cross multiply
   42,220x = 56,838 × 56,838
4. Step 4: Simplify right side
   42,220x = 3,230,558,244
5. Step 5: Solve for x
   x = 3,230,558,244/42,220
6. Step 6: Final answer
   x = 76,517.25