Finding the Fourth Proportional to 3,918.66, 5,856.78 and 3,607.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.66 : 5,856.78 = 3,607.32 : x
2. Step 2: Convert to fraction form
   3,918.66/5,856.78 = 3,607.32/x
3. Step 3: Cross multiply
   3,918.66x = 5,856.78 × 3,607.32
4. Step 4: Simplify right side
   3,918.66x = 21,127,279.63
5. Step 5: Solve for x
   x = 21,127,279.63/3,918.66
6. Step 6: Final answer
   x = 5,391.46