Finding the Fourth Proportional to 13,200.55, 19,796.79 and 5,298.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.55 : 19,796.79 = 5,298.90 : x
2. Step 2: Convert to fraction form
   13,200.55/19,796.79 = 5,298.90/x
3. Step 3: Cross multiply
   13,200.55x = 19,796.79 × 5,298.90
4. Step 4: Simplify right side
   13,200.55x = 104,901,312.27
5. Step 5: Solve for x
   x = 104,901,312.27/13,200.55
6. Step 6: Final answer
   x = 7,946.74