Finding the Fourth Proportional to 2,154.36, 2,971.98 and 1,533.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.36 : 2,971.98 = 1,533.72 : x
2. Step 2: Convert to fraction form
   2,154.36/2,971.98 = 1,533.72/x
3. Step 3: Cross multiply
   2,154.36x = 2,971.98 × 1,533.72
4. Step 4: Simplify right side
   2,154.36x = 4,558,185.17
5. Step 5: Solve for x
   x = 4,558,185.17/2,154.36
6. Step 6: Final answer
   x = 2,115.80