Finding the Fourth Proportional to 5,123.36, 7,070.37 and 2,885.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.36 : 7,070.37 = 2,885.31 : x
2. Step 2: Convert to fraction form
   5,123.36/7,070.37 = 2,885.31/x
3. Step 3: Cross multiply
   5,123.36x = 7,070.37 × 2,885.31
4. Step 4: Simplify right side
   5,123.36x = 20,400,209.26
5. Step 5: Solve for x
   x = 20,400,209.26/5,123.36
6. Step 6: Final answer
   x = 3,981.80