Finding the Fourth Proportional to 10,381.76, 15,570.72 and 5,435.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,381.76 : 15,570.72 = 5,435.84 : x
2. Step 2: Convert to fraction form
   10,381.76/15,570.72 = 5,435.84/x
3. Step 3: Cross multiply
   10,381.76x = 15,570.72 × 5,435.84
4. Step 4: Simplify right side
   10,381.76x = 84,639,942.60
5. Step 5: Solve for x
   x = 84,639,942.60/10,381.76
6. Step 6: Final answer
   x = 8,152.75