Finding the Third Proportional to 19,554 and 42,153

Step by Step Solution

1. Step 1: Write the proportion equation
   19,554 : 42,153 = 42,153 : x
2. Step 2: Convert to fraction form
   19,554/42,153 = 42,153/x
3. Step 3: Cross multiply
   19,554x = 42,153 × 42,153
4. Step 4: Simplify right side
   19,554x = 1,776,875,409
5. Step 5: Solve for x
   x = 1,776,875,409/19,554
6. Step 6: Final answer
   x = 90,870.18