Finding the Fourth Proportional to 8,404.07, 12,603.10 and 2,780.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.07 : 12,603.10 = 2,780.71 : x
2. Step 2: Convert to fraction form
   8,404.07/12,603.10 = 2,780.71/x
3. Step 3: Cross multiply
   8,404.07x = 12,603.10 × 2,780.71
4. Step 4: Simplify right side
   8,404.07x = 35,045,566.20
5. Step 5: Solve for x
   x = 35,045,566.20/8,404.07
6. Step 6: Final answer
   x = 4,170.07