Finding the Fourth Proportional to 1,185.65, 1,780.21 and 981.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.65 : 1,780.21 = 981.52 : x
2. Step 2: Convert to fraction form
   1,185.65/1,780.21 = 981.52/x
3. Step 3: Cross multiply
   1,185.65x = 1,780.21 × 981.52
4. Step 4: Simplify right side
   1,185.65x = 1,747,311.72
5. Step 5: Solve for x
   x = 1,747,311.72/1,185.65
6. Step 6: Final answer
   x = 1,473.72