Finding the Third Proportional to 42,390 and 92,160

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390 : 92,160 = 92,160 : x
2. Step 2: Convert to fraction form
   42,390/92,160 = 92,160/x
3. Step 3: Cross multiply
   42,390x = 92,160 × 92,160
4. Step 4: Simplify right side
   42,390x = 8,493,465,600
5. Step 5: Solve for x
   x = 8,493,465,600/42,390
6. Step 6: Final answer
   x = 200,364.84