Finding the Fourth Proportional to 3,645.47, 5,030.16 and 2,153.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645.47 : 5,030.16 = 2,153.18 : x
2. Step 2: Convert to fraction form
   3,645.47/5,030.16 = 2,153.18/x
3. Step 3: Cross multiply
   3,645.47x = 5,030.16 × 2,153.18
4. Step 4: Simplify right side
   3,645.47x = 10,830,839.91
5. Step 5: Solve for x
   x = 10,830,839.91/3,645.47
6. Step 6: Final answer
   x = 2,971.04