Finding the Fourth Proportional to 13,298.95, 19,951.35 and 3,939.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,298.95 : 19,951.35 = 3,939.70 : x
2. Step 2: Convert to fraction form
   13,298.95/19,951.35 = 3,939.70/x
3. Step 3: Cross multiply
   13,298.95x = 19,951.35 × 3,939.70
4. Step 4: Simplify right side
   13,298.95x = 78,602,333.60
5. Step 5: Solve for x
   x = 78,602,333.60/13,298.95
6. Step 6: Final answer
   x = 5,910.42