Finding the Fourth Proportional to 1,909.72, 2,635.77 and 1,536.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.72 : 2,635.77 = 1,536.58 : x
2. Step 2: Convert to fraction form
   1,909.72/2,635.77 = 1,536.58/x
3. Step 3: Cross multiply
   1,909.72x = 2,635.77 × 1,536.58
4. Step 4: Simplify right side
   1,909.72x = 4,050,071.47
5. Step 5: Solve for x
   x = 4,050,071.47/1,909.72
6. Step 6: Final answer
   x = 2,120.77