Finding the Fourth Proportional to 340,892.61, 470,447.81 and 189,990.69

Step by Step Solution

1. Step 1: Write the proportion equation
   340,892.61 : 470,447.81 = 189,990.69 : x
2. Step 2: Convert to fraction form
   340,892.61/470,447.81 = 189,990.69/x
3. Step 3: Cross multiply
   340,892.61x = 470,447.81 × 189,990.69
4. Step 4: Simplify right side
   340,892.61x = 89,380,704,030.89
5. Step 5: Solve for x
   x = 89,380,704,030.89/340,892.61
6. Step 6: Final answer
   x = 262,196.07