Finding the Fourth Proportional to 9,933.93, 13,708.91 and 5,457.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,933.93 : 13,708.91 = 5,457.78 : x
2. Step 2: Convert to fraction form
   9,933.93/13,708.91 = 5,457.78/x
3. Step 3: Cross multiply
   9,933.93x = 13,708.91 × 5,457.78
4. Step 4: Simplify right side
   9,933.93x = 74,820,214.82
5. Step 5: Solve for x
   x = 74,820,214.82/9,933.93
6. Step 6: Final answer
   x = 7,531.78