Finding the Fourth Proportional to 13,283.76, 19,899.72 and 5,870.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,283.76 : 19,899.72 = 5,870.64 : x
2. Step 2: Convert to fraction form
   13,283.76/19,899.72 = 5,870.64/x
3. Step 3: Cross multiply
   13,283.76x = 19,899.72 × 5,870.64
4. Step 4: Simplify right side
   13,283.76x = 116,824,092.22
5. Step 5: Solve for x
   x = 116,824,092.22/13,283.76
6. Step 6: Final answer
   x = 8,794.50