Finding the Fourth Proportional to 43,019.56, 64,499.84 and 21,918.76

Step by Step Solution

1. Step 1: Write the proportion equation
   43,019.56 : 64,499.84 = 21,918.76 : x
2. Step 2: Convert to fraction form
   43,019.56/64,499.84 = 21,918.76/x
3. Step 3: Cross multiply
   43,019.56x = 64,499.84 × 21,918.76
4. Step 4: Simplify right side
   43,019.56x = 1,413,756,513.00
5. Step 5: Solve for x
   x = 1,413,756,513.00/43,019.56
6. Step 6: Final answer
   x = 32,863.11