Finding the Fourth Proportional to 13,213.59, 19,806.51 and 4,445.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,213.59 : 19,806.51 = 4,445.46 : x
2. Step 2: Convert to fraction form
   13,213.59/19,806.51 = 4,445.46/x
3. Step 3: Cross multiply
   13,213.59x = 19,806.51 × 4,445.46
4. Step 4: Simplify right side
   13,213.59x = 88,049,047.94
5. Step 5: Solve for x
   x = 88,049,047.94/13,213.59
6. Step 6: Final answer
   x = 6,663.52