Finding the Third Proportional to 147,280.78 and 215,168.91

Step by Step Solution

1. Step 1: Write the proportion equation
   147,280.78 : 215,168.91 = 215,168.91 : x
2. Step 2: Convert to fraction form
   147,280.78/215,168.91 = 215,168.91/x
3. Step 3: Cross multiply
   147,280.78x = 215,168.91 × 215,168.91
4. Step 4: Simplify right side
   147,280.78x = 46,297,658,216.82
5. Step 5: Solve for x
   x = 46,297,658,216.82/147,280.78
6. Step 6: Final answer
   x = 314,349.62