Finding the Third Proportional to 42,153 and 90,840

Step by Step Solution

1. Step 1: Write the proportion equation
   42,153 : 90,840 = 90,840 : x
2. Step 2: Convert to fraction form
   42,153/90,840 = 90,840/x
3. Step 3: Cross multiply
   42,153x = 90,840 × 90,840
4. Step 4: Simplify right side
   42,153x = 8,251,905,600
5. Step 5: Solve for x
   x = 8,251,905,600/42,153
6. Step 6: Final answer
   x = 195,760.81