Finding the Fourth Proportional to 341,530.78, 512,320.78 and 131,168.72

Step by Step Solution

1. Step 1: Write the proportion equation
   341,530.78 : 512,320.78 = 131,168.72 : x
2. Step 2: Convert to fraction form
   341,530.78/512,320.78 = 131,168.72/x
3. Step 3: Cross multiply
   341,530.78x = 512,320.78 × 131,168.72
4. Step 4: Simplify right side
   341,530.78x = 67,200,459,973.68
5. Step 5: Solve for x
   x = 67,200,459,973.68/341,530.78
6. Step 6: Final answer
   x = 196,762.53