Finding the Fourth Proportional to 10,530.51, 15,795.57 and 3,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,530.51 : 15,795.57 = 3,139.98 : x
2. Step 2: Convert to fraction form
   10,530.51/15,795.57 = 3,139.98/x
3. Step 3: Cross multiply
   10,530.51x = 15,795.57 × 3,139.98
4. Step 4: Simplify right side
   10,530.51x = 49,597,773.89
5. Step 5: Solve for x
   x = 49,597,773.89/10,530.51
6. Step 6: Final answer
   x = 4,709.91