Finding the Fourth Proportional to 342,123, 472,144.32 and 191,220

Step by Step Solution

1. Step 1: Write the proportion equation
   342,123 : 472,144.32 = 191,220 : x
2. Step 2: Convert to fraction form
   342,123/472,144.32 = 191,220/x
3. Step 3: Cross multiply
   342,123x = 472,144.32 × 191,220
4. Step 4: Simplify right side
   342,123x = 90,283,436,870.40
5. Step 5: Solve for x
   x = 90,283,436,870.40/342,123
6. Step 6: Final answer
   x = 263,891.75