Finding the Fourth Proportional to 13,857.50, 20,773.28 and 5,090.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,857.50 : 20,773.28 = 5,090.06 : x
2. Step 2: Convert to fraction form
   13,857.50/20,773.28 = 5,090.06/x
3. Step 3: Cross multiply
   13,857.50x = 20,773.28 × 5,090.06
4. Step 4: Simplify right side
   13,857.50x = 105,737,150.46
5. Step 5: Solve for x
   x = 105,737,150.46/13,857.50
6. Step 6: Final answer
   x = 7,630.32