Finding the Third Proportional to 42,156 and 90,291

Step by Step Solution

1. Step 1: Write the proportion equation
   42,156 : 90,291 = 90,291 : x
2. Step 2: Convert to fraction form
   42,156/90,291 = 90,291/x
3. Step 3: Cross multiply
   42,156x = 90,291 × 90,291
4. Step 4: Simplify right side
   42,156x = 8,152,464,681
5. Step 5: Solve for x
   x = 8,152,464,681/42,156
6. Step 6: Final answer
   x = 193,388.00