Finding the Fourth Proportional to 80,289.09, 120,368.00 and 30,340.89

Step by Step Solution

1. Step 1: Write the proportion equation
   80,289.09 : 120,368.00 = 30,340.89 : x
2. Step 2: Convert to fraction form
   80,289.09/120,368.00 = 30,340.89/x
3. Step 3: Cross multiply
   80,289.09x = 120,368.00 × 30,340.89
4. Step 4: Simplify right side
   80,289.09x = 3,652,072,095.82
5. Step 5: Solve for x
   x = 3,652,072,095.82/80,289.09
6. Step 6: Final answer
   x = 45,486.53