Finding the Fourth Proportional to 11,320.08, 16,980.72 and 3,422.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,320.08 : 16,980.72 = 3,422.40 : x
2. Step 2: Convert to fraction form
   11,320.08/16,980.72 = 3,422.40/x
3. Step 3: Cross multiply
   11,320.08x = 16,980.72 × 3,422.40
4. Step 4: Simplify right side
   11,320.08x = 58,114,752.34
5. Step 5: Solve for x
   x = 58,114,752.34/11,320.08
6. Step 6: Final answer
   x = 5,133.77