Finding the Third Proportional to 74,931.75 and 156,791.25

Step by Step Solution

1. Step 1: Write the proportion equation
   74,931.75 : 156,791.25 = 156,791.25 : x
2. Step 2: Convert to fraction form
   74,931.75/156,791.25 = 156,791.25/x
3. Step 3: Cross multiply
   74,931.75x = 156,791.25 × 156,791.25
4. Step 4: Simplify right side
   74,931.75x = 24,583,496,076.56
5. Step 5: Solve for x
   x = 24,583,496,076.56/74,931.75
6. Step 6: Final answer
   x = 328,078.50