Finding the Fourth Proportional to 5,090.48, 7,635.69 and 1,392.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090.48 : 7,635.69 = 1,392.60 : x
2. Step 2: Convert to fraction form
   5,090.48/7,635.69 = 1,392.60/x
3. Step 3: Cross multiply
   5,090.48x = 7,635.69 × 1,392.60
4. Step 4: Simplify right side
   5,090.48x = 10,633,461.89
5. Step 5: Solve for x
   x = 10,633,461.89/5,090.48
6. Step 6: Final answer
   x = 2,088.89