Finding the Fourth Proportional to 1,921.86, 2,898.72 and 1,693.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.86 : 2,898.72 = 1,693.59 : x
2. Step 2: Convert to fraction form
   1,921.86/2,898.72 = 1,693.59/x
3. Step 3: Cross multiply
   1,921.86x = 2,898.72 × 1,693.59
4. Step 4: Simplify right side
   1,921.86x = 4,909,243.20
5. Step 5: Solve for x
   x = 4,909,243.20/1,921.86
6. Step 6: Final answer
   x = 2,554.42