Finding the Fourth Proportional to 151,791.40, 212,819 and 151,791.40

Step by Step Solution

1. Step 1: Write the proportion equation
   151,791.40 : 212,819 = 151,791.40 : x
2. Step 2: Convert to fraction form
   151,791.40/212,819 = 151,791.40/x
3. Step 3: Cross multiply
   151,791.40x = 212,819 × 151,791.40
4. Step 4: Simplify right side
   151,791.40x = 32,304,093,956.60
5. Step 5: Solve for x
   x = 32,304,093,956.60/151,791.40
6. Step 6: Final answer
   x = 212,819