Finding the Third Proportional to 42,820 and 88,621

Step by Step Solution

1. Step 1: Write the proportion equation
   42,820 : 88,621 = 88,621 : x
2. Step 2: Convert to fraction form
   42,820/88,621 = 88,621/x
3. Step 3: Cross multiply
   42,820x = 88,621 × 88,621
4. Step 4: Simplify right side
   42,820x = 7,853,681,641
5. Step 5: Solve for x
   x = 7,853,681,641/42,820
6. Step 6: Final answer
   x = 183,411.53