Finding the Fourth Proportional to 172,340.10, 258,704.55 and 133,071.30

Step by Step Solution

1. Step 1: Write the proportion equation
   172,340.10 : 258,704.55 = 133,071.30 : x
2. Step 2: Convert to fraction form
   172,340.10/258,704.55 = 133,071.30/x
3. Step 3: Cross multiply
   172,340.10x = 258,704.55 × 133,071.30
4. Step 4: Simplify right side
   172,340.10x = 34,426,150,784.42
5. Step 5: Solve for x
   x = 34,426,150,784.42/172,340.10
6. Step 6: Final answer
   x = 199,757.05