Finding the Fourth Proportional to 2,011.98, 3,019.47 and 917.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.98 : 3,019.47 = 917.07 : x
2. Step 2: Convert to fraction form
   2,011.98/3,019.47 = 917.07/x
3. Step 3: Cross multiply
   2,011.98x = 3,019.47 × 917.07
4. Step 4: Simplify right side
   2,011.98x = 2,769,065.35
5. Step 5: Solve for x
   x = 2,769,065.35/2,011.98
6. Step 6: Final answer
   x = 1,376.29