Finding the Fourth Proportional to 171,145.20, 256,742.10 and 52,804.20

Step by Step Solution

1. Step 1: Write the proportion equation
   171,145.20 : 256,742.10 = 52,804.20 : x
2. Step 2: Convert to fraction form
   171,145.20/256,742.10 = 52,804.20/x
3. Step 3: Cross multiply
   171,145.20x = 256,742.10 × 52,804.20
4. Step 4: Simplify right side
   171,145.20x = 13,557,061,196.82
5. Step 5: Solve for x
   x = 13,557,061,196.82/171,145.20
6. Step 6: Final answer
   x = 79,213.80