Finding the Third Proportional to 55,578 and 131,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,578 : 131,116.50 = 131,116.50 : x
2. Step 2: Convert to fraction form
   55,578/131,116.50 = 131,116.50/x
3. Step 3: Cross multiply
   55,578x = 131,116.50 × 131,116.50
4. Step 4: Simplify right side
   55,578x = 17,191,536,572.25
5. Step 5: Solve for x
   x = 17,191,536,572.25/55,578
6. Step 6: Final answer
   x = 309,322.69