Finding the Fourth Proportional to 43,510.45, 65,275.25 and 13,931.28

Step by Step Solution

1. Step 1: Write the proportion equation
   43,510.45 : 65,275.25 = 13,931.28 : x
2. Step 2: Convert to fraction form
   43,510.45/65,275.25 = 13,931.28/x
3. Step 3: Cross multiply
   43,510.45x = 65,275.25 × 13,931.28
4. Step 4: Simplify right side
   43,510.45x = 909,367,784.82
5. Step 5: Solve for x
   x = 909,367,784.82/43,510.45
6. Step 6: Final answer
   x = 20,899.99