Finding the Fourth Proportional to 7,913.50, 10,920.82 and 5,123.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,913.50 : 10,920.82 = 5,123.86 : x
2. Step 2: Convert to fraction form
   7,913.50/10,920.82 = 5,123.86/x
3. Step 3: Cross multiply
   7,913.50x = 10,920.82 × 5,123.86
4. Step 4: Simplify right side
   7,913.50x = 55,956,752.77
5. Step 5: Solve for x
   x = 55,956,752.77/7,913.50
6. Step 6: Final answer
   x = 7,071.05