Finding the Fourth Proportional to 5,123.82, 7,068.31 and 3,130.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.82 : 7,068.31 = 3,130.90 : x
2. Step 2: Convert to fraction form
   5,123.82/7,068.31 = 3,130.90/x
3. Step 3: Cross multiply
   5,123.82x = 7,068.31 × 3,130.90
4. Step 4: Simplify right side
   5,123.82x = 22,130,171.78
5. Step 5: Solve for x
   x = 22,130,171.78/5,123.82
6. Step 6: Final answer
   x = 4,319.08