Finding the Third Proportional to 19,700 and 42,328

Step by Step Solution

1. Step 1: Write the proportion equation
   19,700 : 42,328 = 42,328 : x
2. Step 2: Convert to fraction form
   19,700/42,328 = 42,328/x
3. Step 3: Cross multiply
   19,700x = 42,328 × 42,328
4. Step 4: Simplify right side
   19,700x = 1,791,659,584
5. Step 5: Solve for x
   x = 1,791,659,584/19,700
6. Step 6: Final answer
   x = 90,947.19