Finding the Fourth Proportional to 8,914.10, 13,345.55 and 5,458.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,914.10 : 13,345.55 = 5,458.10 : x
2. Step 2: Convert to fraction form
   8,914.10/13,345.55 = 5,458.10/x
3. Step 3: Cross multiply
   8,914.10x = 13,345.55 × 5,458.10
4. Step 4: Simplify right side
   8,914.10x = 72,841,346.46
5. Step 5: Solve for x
   x = 72,841,346.46/8,914.10
6. Step 6: Final answer
   x = 8,171.48