Finding the Fourth Proportional to 1,345.20, 1,854.72 and 1,095.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.20 : 1,854.72 = 1,095.60 : x
2. Step 2: Convert to fraction form
   1,345.20/1,854.72 = 1,095.60/x
3. Step 3: Cross multiply
   1,345.20x = 1,854.72 × 1,095.60
4. Step 4: Simplify right side
   1,345.20x = 2,032,031.23
5. Step 5: Solve for x
   x = 2,032,031.23/1,345.20
6. Step 6: Final answer
   x = 1,510.58