Finding the Fourth Proportional to 5,312.58, 7,928.69 and 5,174.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,312.58 : 7,928.69 = 5,174.34 : x
2. Step 2: Convert to fraction form
   5,312.58/7,928.69 = 5,174.34/x
3. Step 3: Cross multiply
   5,312.58x = 7,928.69 × 5,174.34
4. Step 4: Simplify right side
   5,312.58x = 41,025,737.81
5. Step 5: Solve for x
   x = 41,025,737.81/5,312.58
6. Step 6: Final answer
   x = 7,722.38