Finding the Fourth Proportional to 2,101.78, 2,900.52 and 1,157.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.78 : 2,900.52 = 1,157.59 : x
2. Step 2: Convert to fraction form
   2,101.78/2,900.52 = 1,157.59/x
3. Step 3: Cross multiply
   2,101.78x = 2,900.52 × 1,157.59
4. Step 4: Simplify right side
   2,101.78x = 3,357,605.70
5. Step 5: Solve for x
   x = 3,357,605.70/2,101.78
6. Step 6: Final answer
   x = 1,597.51