Finding the Fourth Proportional to 5,009.31, 7,499.99 and 2,538.81

Step by Step Solution

1. Step 1: Write the proportion equation
   5,009.31 : 7,499.99 = 2,538.81 : x
2. Step 2: Convert to fraction form
   5,009.31/7,499.99 = 2,538.81/x
3. Step 3: Cross multiply
   5,009.31x = 7,499.99 × 2,538.81
4. Step 4: Simplify right side
   5,009.31x = 19,041,055.96
5. Step 5: Solve for x
   x = 19,041,055.96/5,009.31
6. Step 6: Final answer
   x = 3,801.13