Finding the Fourth Proportional to 10,051.47, 13,870.78 and 5,575.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,051.47 : 13,870.78 = 5,575.21 : x
2. Step 2: Convert to fraction form
   10,051.47/13,870.78 = 5,575.21/x
3. Step 3: Cross multiply
   10,051.47x = 13,870.78 × 5,575.21
4. Step 4: Simplify right side
   10,051.47x = 77,332,462.75
5. Step 5: Solve for x
   x = 77,332,462.75/10,051.47
6. Step 6: Final answer
   x = 7,693.65