Finding the Third Proportional to 42,049 and 87,991

Step by Step Solution

1. Step 1: Write the proportion equation
   42,049 : 87,991 = 87,991 : x
2. Step 2: Convert to fraction form
   42,049/87,991 = 87,991/x
3. Step 3: Cross multiply
   42,049x = 87,991 × 87,991
4. Step 4: Simplify right side
   42,049x = 7,742,416,081
5. Step 5: Solve for x
   x = 7,742,416,081/42,049
6. Step 6: Final answer
   x = 184,128.42