Finding the Fourth Proportional to 1,645.42, 2,272.16 and 1,530.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.42 : 2,272.16 = 1,530.61 : x
2. Step 2: Convert to fraction form
   1,645.42/2,272.16 = 1,530.61/x
3. Step 3: Cross multiply
   1,645.42x = 2,272.16 × 1,530.61
4. Step 4: Simplify right side
   1,645.42x = 3,477,790.82
5. Step 5: Solve for x
   x = 3,477,790.82/1,645.42
6. Step 6: Final answer
   x = 2,113.62