Finding the Fourth Proportional to 9,415.98, 14,115.89 and 3,865.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.98 : 14,115.89 = 3,865.86 : x
2. Step 2: Convert to fraction form
   9,415.98/14,115.89 = 3,865.86/x
3. Step 3: Cross multiply
   9,415.98x = 14,115.89 × 3,865.86
4. Step 4: Simplify right side
   9,415.98x = 54,570,064.18
5. Step 5: Solve for x
   x = 54,570,064.18/9,415.98
6. Step 6: Final answer
   x = 5,795.47