Finding the Fourth Proportional to 13,253.76, 19,876.38 and 5,858.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,253.76 : 19,876.38 = 5,858.05 : x
2. Step 2: Convert to fraction form
   13,253.76/19,876.38 = 5,858.05/x
3. Step 3: Cross multiply
   13,253.76x = 19,876.38 × 5,858.05
4. Step 4: Simplify right side
   13,253.76x = 116,436,827.86
5. Step 5: Solve for x
   x = 116,436,827.86/13,253.76
6. Step 6: Final answer
   x = 8,785.20