Finding the Fourth Proportional to 7,111.32, 10,666.74 and 1,917

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.32 : 10,666.74 = 1,917 : x
2. Step 2: Convert to fraction form
   7,111.32/10,666.74 = 1,917/x
3. Step 3: Cross multiply
   7,111.32x = 10,666.74 × 1,917
4. Step 4: Simplify right side
   7,111.32x = 20,448,140.58
5. Step 5: Solve for x
   x = 20,448,140.58/7,111.32
6. Step 6: Final answer
   x = 2,875.44