Finding the Fourth Proportional to 13,005.64, 19,510.50 and 5,612.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,005.64 : 19,510.50 = 5,612.20 : x
2. Step 2: Convert to fraction form
   13,005.64/19,510.50 = 5,612.20/x
3. Step 3: Cross multiply
   13,005.64x = 19,510.50 × 5,612.20
4. Step 4: Simplify right side
   13,005.64x = 109,496,828.10
5. Step 5: Solve for x
   x = 109,496,828.10/13,005.64
6. Step 6: Final answer
   x = 8,419.18