Finding the Fourth Proportional to 1,693.48, 2,538.48 and 1,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,693.48 : 2,538.48 = 1,145.72 : x
2. Step 2: Convert to fraction form
   1,693.48/2,538.48 = 1,145.72/x
3. Step 3: Cross multiply
   1,693.48x = 2,538.48 × 1,145.72
4. Step 4: Simplify right side
   1,693.48x = 2,908,374.61
5. Step 5: Solve for x
   x = 2,908,374.61/1,693.48
6. Step 6: Final answer
   x = 1,717.40