Finding the Fourth Proportional to 13,264.56, 19,877.40 and 5,478.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,264.56 : 19,877.40 = 5,478.84 : x
2. Step 2: Convert to fraction form
   13,264.56/19,877.40 = 5,478.84/x
3. Step 3: Cross multiply
   13,264.56x = 19,877.40 × 5,478.84
4. Step 4: Simplify right side
   13,264.56x = 108,905,094.22
5. Step 5: Solve for x
   x = 108,905,094.22/13,264.56
6. Step 6: Final answer
   x = 8,210.23