Finding the Fourth Proportional to 5,123.89, 7,070.55 and 2,885.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.89 : 7,070.55 = 2,885.32 : x
2. Step 2: Convert to fraction form
   5,123.89/7,070.55 = 2,885.32/x
3. Step 3: Cross multiply
   5,123.89x = 7,070.55 × 2,885.32
4. Step 4: Simplify right side
   5,123.89x = 20,400,799.33
5. Step 5: Solve for x
   x = 20,400,799.33/5,123.89
6. Step 6: Final answer
   x = 3,981.51