Finding the Fourth Proportional to 7,121.31, 10,637.56 and 5,276.03

Step by Step Solution

1. Step 1: Write the proportion equation
   7,121.31 : 10,637.56 = 5,276.03 : x
2. Step 2: Convert to fraction form
   7,121.31/10,637.56 = 5,276.03/x
3. Step 3: Cross multiply
   7,121.31x = 10,637.56 × 5,276.03
4. Step 4: Simplify right side
   7,121.31x = 56,124,019.31
5. Step 5: Solve for x
   x = 56,124,019.31/7,121.31
6. Step 6: Final answer
   x = 7,881.14