Finding the Fourth Proportional to 5,390.34, 7,436.16 and 3,501.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390.34 : 7,436.16 = 3,501.78 : x
2. Step 2: Convert to fraction form
   5,390.34/7,436.16 = 3,501.78/x
3. Step 3: Cross multiply
   5,390.34x = 7,436.16 × 3,501.78
4. Step 4: Simplify right side
   5,390.34x = 26,039,796.36
5. Step 5: Solve for x
   x = 26,039,796.36/5,390.34
6. Step 6: Final answer
   x = 4,830.83