Finding the Fourth Proportional to 10,045.56, 15,068.28 and 5,457.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,045.56 : 15,068.28 = 5,457.72 : x
2. Step 2: Convert to fraction form
   10,045.56/15,068.28 = 5,457.72/x
3. Step 3: Cross multiply
   10,045.56x = 15,068.28 × 5,457.72
4. Step 4: Simplify right side
   10,045.56x = 82,238,453.12
5. Step 5: Solve for x
   x = 82,238,453.12/10,045.56
6. Step 6: Final answer
   x = 8,186.55