Finding the Fourth Proportional to 3,645.31, 5,030.33 and 2,152.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645.31 : 5,030.33 = 2,152.89 : x
2. Step 2: Convert to fraction form
   3,645.31/5,030.33 = 2,152.89/x
3. Step 3: Cross multiply
   3,645.31x = 5,030.33 × 2,152.89
4. Step 4: Simplify right side
   3,645.31x = 10,829,747.15
5. Step 5: Solve for x
   x = 10,829,747.15/3,645.31
6. Step 6: Final answer
   x = 2,970.87