Finding the Fourth Proportional to 1,320.18, 1,825.32 and 1,156.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.18 : 1,825.32 = 1,156.15 : x
2. Step 2: Convert to fraction form
   1,320.18/1,825.32 = 1,156.15/x
3. Step 3: Cross multiply
   1,320.18x = 1,825.32 × 1,156.15
4. Step 4: Simplify right side
   1,320.18x = 2,110,343.72
5. Step 5: Solve for x
   x = 2,110,343.72/1,320.18
6. Step 6: Final answer
   x = 1,598.53