Finding the Fourth Proportional to 1,061.58, 1,596.03 and 981.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.58 : 1,596.03 = 981.40 : x
2. Step 2: Convert to fraction form
   1,061.58/1,596.03 = 981.40/x
3. Step 3: Cross multiply
   1,061.58x = 1,596.03 × 981.40
4. Step 4: Simplify right side
   1,061.58x = 1,566,343.84
5. Step 5: Solve for x
   x = 1,566,343.84/1,061.58
6. Step 6: Final answer
   x = 1,475.48