Finding the Fourth Proportional to 13,128.83, 19,686.67 and 4,360.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.83 : 19,686.67 = 4,360.67 : x
2. Step 2: Convert to fraction form
   13,128.83/19,686.67 = 4,360.67/x
3. Step 3: Cross multiply
   13,128.83x = 19,686.67 × 4,360.67
4. Step 4: Simplify right side
   13,128.83x = 85,847,071.27
5. Step 5: Solve for x
   x = 85,847,071.27/13,128.83
6. Step 6: Final answer
   x = 6,538.82