Finding the Fourth Proportional to 1,913.46, 2,636.61 and 1,538.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.46 : 2,636.61 = 1,538.94 : x
2. Step 2: Convert to fraction form
   1,913.46/2,636.61 = 1,538.94/x
3. Step 3: Cross multiply
   1,913.46x = 2,636.61 × 1,538.94
4. Step 4: Simplify right side
   1,913.46x = 4,057,584.59
5. Step 5: Solve for x
   x = 4,057,584.59/1,913.46
6. Step 6: Final answer
   x = 2,120.55