Finding the Fourth Proportional to 300,139.15, 450,042.48 and 122,770.69

Step by Step Solution

1. Step 1: Write the proportion equation
   300,139.15 : 450,042.48 = 122,770.69 : x
2. Step 2: Convert to fraction form
   300,139.15/450,042.48 = 122,770.69/x
3. Step 3: Cross multiply
   300,139.15x = 450,042.48 × 122,770.69
4. Step 4: Simplify right side
   300,139.15x = 55,252,025,798.91
5. Step 5: Solve for x
   x = 55,252,025,798.91/300,139.15
6. Step 6: Final answer
   x = 184,088.03