Finding the Fourth Proportional to 340,401.57, 469,743.89 and 187,440.09

Step by Step Solution

1. Step 1: Write the proportion equation
   340,401.57 : 469,743.89 = 187,440.09 : x
2. Step 2: Convert to fraction form
   340,401.57/469,743.89 = 187,440.09/x
3. Step 3: Cross multiply
   340,401.57x = 469,743.89 × 187,440.09
4. Step 4: Simplify right side
   340,401.57x = 88,048,836,081.35
5. Step 5: Solve for x
   x = 88,048,836,081.35/340,401.57
6. Step 6: Final answer
   x = 258,661.66