Finding the Fourth Proportional to 5,380.52, 8,068.35 and 5,210.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,380.52 : 8,068.35 = 5,210.42 : x
2. Step 2: Convert to fraction form
   5,380.52/8,068.35 = 5,210.42/x
3. Step 3: Cross multiply
   5,380.52x = 8,068.35 × 5,210.42
4. Step 4: Simplify right side
   5,380.52x = 42,039,492.21
5. Step 5: Solve for x
   x = 42,039,492.21/5,380.52
6. Step 6: Final answer
   x = 7,813.28