Finding the Fourth Proportional to 10,339.57, 15,503.47 and 7,056.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,339.57 : 15,503.47 = 7,056.64 : x
2. Step 2: Convert to fraction form
   10,339.57/15,503.47 = 7,056.64/x
3. Step 3: Cross multiply
   10,339.57x = 15,503.47 × 7,056.64
4. Step 4: Simplify right side
   10,339.57x = 109,402,406.54
5. Step 5: Solve for x
   x = 109,402,406.54/10,339.57
6. Step 6: Final answer
   x = 10,580.94