Finding the Fourth Proportional to 1,623.69, 2,242.01 and 1,542.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.69 : 2,242.01 = 1,542.15 : x
2. Step 2: Convert to fraction form
   1,623.69/2,242.01 = 1,542.15/x
3. Step 3: Cross multiply
   1,623.69x = 2,242.01 × 1,542.15
4. Step 4: Simplify right side
   1,623.69x = 3,457,515.72
5. Step 5: Solve for x
   x = 3,457,515.72/1,623.69
6. Step 6: Final answer
   x = 2,129.42