Finding the Fourth Proportional to 6,402.42, 8,835.15 and 3,607.86

Step by Step Solution

1. Step 1: Write the proportion equation
   6,402.42 : 8,835.15 = 3,607.86 : x
2. Step 2: Convert to fraction form
   6,402.42/8,835.15 = 3,607.86/x
3. Step 3: Cross multiply
   6,402.42x = 8,835.15 × 3,607.86
4. Step 4: Simplify right side
   6,402.42x = 31,875,984.28
5. Step 5: Solve for x
   x = 31,875,984.28/6,402.42
6. Step 6: Final answer
   x = 4,978.74