Finding the Fourth Proportional to 10,357.61, 15,530.43 and 7,074.68

Step by Step Solution

1. Step 1: Write the proportion equation
   10,357.61 : 15,530.43 = 7,074.68 : x
2. Step 2: Convert to fraction form
   10,357.61/15,530.43 = 7,074.68/x
3. Step 3: Cross multiply
   10,357.61x = 15,530.43 × 7,074.68
4. Step 4: Simplify right side
   10,357.61x = 109,872,822.51
5. Step 5: Solve for x
   x = 109,872,822.51/10,357.61
6. Step 6: Final answer
   x = 10,607.93