Finding the Fourth Proportional to 2,978.31, 4,100.70 and 2,529.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.31 : 4,100.70 = 2,529.23 : x
2. Step 2: Convert to fraction form
   2,978.31/4,100.70 = 2,529.23/x
3. Step 3: Cross multiply
   2,978.31x = 4,100.70 × 2,529.23
4. Step 4: Simplify right side
   2,978.31x = 10,371,613.46
5. Step 5: Solve for x
   x = 10,371,613.46/2,978.31
6. Step 6: Final answer
   x = 3,482.38