Finding the Fourth Proportional to 12,917.64, 19,376.56 and 3,558.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917.64 : 19,376.56 = 3,558.17 : x
2. Step 2: Convert to fraction form
   12,917.64/19,376.56 = 3,558.17/x
3. Step 3: Cross multiply
   12,917.64x = 19,376.56 × 3,558.17
4. Step 4: Simplify right side
   12,917.64x = 68,945,094.50
5. Step 5: Solve for x
   x = 68,945,094.50/12,917.64
6. Step 6: Final answer
   x = 5,337.28