Finding the Fourth Proportional to 5,123.34, 7,070.34 and 2,999.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.34 : 7,070.34 = 2,999.10 : x
2. Step 2: Convert to fraction form
   5,123.34/7,070.34 = 2,999.10/x
3. Step 3: Cross multiply
   5,123.34x = 7,070.34 × 2,999.10
4. Step 4: Simplify right side
   5,123.34x = 21,204,656.69
5. Step 5: Solve for x
   x = 21,204,656.69/5,123.34
6. Step 6: Final answer
   x = 4,138.83