Finding the Third Proportional to 131,513.63 and 280,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   131,513.63 : 280,978.88 = 280,978.88 : x
2. Step 2: Convert to fraction form
   131,513.63/280,978.88 = 280,978.88/x
3. Step 3: Cross multiply
   131,513.63x = 280,978.88 × 280,978.88
4. Step 4: Simplify right side
   131,513.63x = 78,949,128,196.27
5. Step 5: Solve for x
   x = 78,949,128,196.27/131,513.63
6. Step 6: Final answer
   x = 600,311.40