Finding the Fourth Proportional to 6,602.72, 9,106.72 and 4,213.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,602.72 : 9,106.72 = 4,213.42 : x
2. Step 2: Convert to fraction form
   6,602.72/9,106.72 = 4,213.42/x
3. Step 3: Cross multiply
   6,602.72x = 9,106.72 × 4,213.42
4. Step 4: Simplify right side
   6,602.72x = 38,370,402.88
5. Step 5: Solve for x
   x = 38,370,402.88/6,602.72
6. Step 6: Final answer
   x = 5,811.31