Finding the Fourth Proportional to 342,121, 472,141.56 and 191,218

Step by Step Solution

1. Step 1: Write the proportion equation
   342,121 : 472,141.56 = 191,218 : x
2. Step 2: Convert to fraction form
   342,121/472,141.56 = 191,218/x
3. Step 3: Cross multiply
   342,121x = 472,141.56 × 191,218
4. Step 4: Simplify right side
   342,121x = 90,281,964,820.08
5. Step 5: Solve for x
   x = 90,281,964,820.08/342,121
6. Step 6: Final answer
   x = 263,888.99