Finding the Fourth Proportional to 10,556.45, 14,569.91 and 7,539.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,556.45 : 14,569.91 = 7,539.74 : x
2. Step 2: Convert to fraction form
   10,556.45/14,569.91 = 7,539.74/x
3. Step 3: Cross multiply
   10,556.45x = 14,569.91 × 7,539.74
4. Step 4: Simplify right side
   10,556.45x = 109,853,333.22
5. Step 5: Solve for x
   x = 109,853,333.22/10,556.45
6. Step 6: Final answer
   x = 10,406.28