Finding the Fourth Proportional to 7,921.60, 10,931.82 and 4,385.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,921.60 : 10,931.82 = 4,385.34 : x
2. Step 2: Convert to fraction form
   7,921.60/10,931.82 = 4,385.34/x
3. Step 3: Cross multiply
   7,921.60x = 10,931.82 × 4,385.34
4. Step 4: Simplify right side
   7,921.60x = 47,939,747.52
5. Step 5: Solve for x
   x = 47,939,747.52/7,921.60
6. Step 6: Final answer
   x = 6,051.78