Finding the Fourth Proportional to 151,728.15, 212,025.75 and 151,728.15

Step by Step Solution

1. Step 1: Write the proportion equation
   151,728.15 : 212,025.75 = 151,728.15 : x
2. Step 2: Convert to fraction form
   151,728.15/212,025.75 = 151,728.15/x
3. Step 3: Cross multiply
   151,728.15x = 212,025.75 × 151,728.15
4. Step 4: Simplify right side
   151,728.15x = 32,170,274,799.86
5. Step 5: Solve for x
   x = 32,170,274,799.86/151,728.15
6. Step 6: Final answer
   x = 212,025.75