Finding the Fourth Proportional to 1,061.07, 1,591.59 and 291.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.07 : 1,591.59 = 291.57 : x
2. Step 2: Convert to fraction form
   1,061.07/1,591.59 = 291.57/x
3. Step 3: Cross multiply
   1,061.07x = 1,591.59 × 291.57
4. Step 4: Simplify right side
   1,061.07x = 464,059.90
5. Step 5: Solve for x
   x = 464,059.90/1,061.07
6. Step 6: Final answer
   x = 437.35