Finding the Fourth Proportional to 7,429.90, 11,123.25 and 5,781.45

Step by Step Solution

1. Step 1: Write the proportion equation
   7,429.90 : 11,123.25 = 5,781.45 : x
2. Step 2: Convert to fraction form
   7,429.90/11,123.25 = 5,781.45/x
3. Step 3: Cross multiply
   7,429.90x = 11,123.25 × 5,781.45
4. Step 4: Simplify right side
   7,429.90x = 64,308,518.72
5. Step 5: Solve for x
   x = 64,308,518.72/7,429.90
6. Step 6: Final answer
   x = 8,655.37