Finding the Third Proportional to 56.13 and 131.79

Step by Step Solution

1. Step 1: Write the proportion equation
   56.13 : 131.79 = 131.79 : x
2. Step 2: Convert to fraction form
   56.13/131.79 = 131.79/x
3. Step 3: Cross multiply
   56.13x = 131.79 × 131.79
4. Step 4: Simplify right side
   56.13x = 17,368.98
5. Step 5: Solve for x
   x = 17,368.98/56.13
6. Step 6: Final answer
   x = 309.42