Finding the Fourth Proportional to 43,087.91, 64,633.93 and 13,506

Step by Step Solution

1. Step 1: Write the proportion equation
   43,087.91 : 64,633.93 = 13,506 : x
2. Step 2: Convert to fraction form
   43,087.91/64,633.93 = 13,506/x
3. Step 3: Cross multiply
   43,087.91x = 64,633.93 × 13,506
4. Step 4: Simplify right side
   43,087.91x = 872,945,858.58
5. Step 5: Solve for x
   x = 872,945,858.58/43,087.91
6. Step 6: Final answer
   x = 20,259.65