Finding the Fourth Proportional to 792,748.10, 1,189,079.69 and 280,377.74

Step by Step Solution

1. Step 1: Write the proportion equation
   792,748.10 : 1,189,079.69 = 280,377.74 : x
2. Step 2: Convert to fraction form
   792,748.10/1,189,079.69 = 280,377.74/x
3. Step 3: Cross multiply
   792,748.10x = 1,189,079.69 × 280,377.74
4. Step 4: Simplify right side
   792,748.10x = 333,391,468,814.81
5. Step 5: Solve for x
   x = 333,391,468,814.81/792,748.10
6. Step 6: Final answer
   x = 420,551.59