Finding the Third Proportional to 61.88 and 90.06

Step by Step Solution

1. Step 1: Write the proportion equation
   61.88 : 90.06 = 90.06 : x
2. Step 2: Convert to fraction form
   61.88/90.06 = 90.06/x
3. Step 3: Cross multiply
   61.88x = 90.06 × 90.06
4. Step 4: Simplify right side
   61.88x = 8,111.25
5. Step 5: Solve for x
   x = 8,111.25/61.88
6. Step 6: Final answer
   x = 131.09