Finding the Fourth Proportional to 354,168.12, 488,737.78 and 193,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   354,168.12 : 488,737.78 = 193,019.72 : x
2. Step 2: Convert to fraction form
   354,168.12/488,737.78 = 193,019.72/x
3. Step 3: Cross multiply
   354,168.12x = 488,737.78 × 193,019.72
4. Step 4: Simplify right side
   354,168.12x = 94,336,026,522.78
5. Step 5: Solve for x
   x = 94,336,026,522.78/354,168.12
6. Step 6: Final answer
   x = 266,359.45