Finding the Fourth Proportional to 1,358.77, 1,875.71 and 911.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.77 : 1,875.71 = 911.35 : x
2. Step 2: Convert to fraction form
   1,358.77/1,875.71 = 911.35/x
3. Step 3: Cross multiply
   1,358.77x = 1,875.71 × 911.35
4. Step 4: Simplify right side
   1,358.77x = 1,709,428.31
5. Step 5: Solve for x
   x = 1,709,428.31/1,358.77
6. Step 6: Final answer
   x = 1,258.07