Finding the Fourth Proportional to 6,430.45, 8,877.89 and 4,196.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,430.45 : 8,877.89 = 4,196.20 : x
2. Step 2: Convert to fraction form
   6,430.45/8,877.89 = 4,196.20/x
3. Step 3: Cross multiply
   6,430.45x = 8,877.89 × 4,196.20
4. Step 4: Simplify right side
   6,430.45x = 37,253,402.02
5. Step 5: Solve for x
   x = 37,253,402.02/6,430.45
6. Step 6: Final answer
   x = 5,793.28