Finding the Fourth Proportional to 342,089.72, 472,069.89 and 189,118.18

Step by Step Solution

1. Step 1: Write the proportion equation
   342,089.72 : 472,069.89 = 189,118.18 : x
2. Step 2: Convert to fraction form
   342,089.72/472,069.89 = 189,118.18/x
3. Step 3: Cross multiply
   342,089.72x = 472,069.89 × 189,118.18
4. Step 4: Simplify right side
   342,089.72x = 89,276,998,429.60
5. Step 5: Solve for x
   x = 89,276,998,429.60/342,089.72
6. Step 6: Final answer
   x = 260,975.39