Finding the Fourth Proportional to 43,018.56, 64,498.34 and 21,917.76

Step by Step Solution

1. Step 1: Write the proportion equation
   43,018.56 : 64,498.34 = 21,917.76 : x
2. Step 2: Convert to fraction form
   43,018.56/64,498.34 = 21,917.76/x
3. Step 3: Cross multiply
   43,018.56x = 64,498.34 × 21,917.76
4. Step 4: Simplify right side
   43,018.56x = 1,413,659,136.52
5. Step 5: Solve for x
   x = 1,413,659,136.52/43,018.56
6. Step 6: Final answer
   x = 32,861.61