Finding the Fourth Proportional to 42,871.83, 64,317.15 and 14,407.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,871.83 : 64,317.15 = 14,407.77 : x
2. Step 2: Convert to fraction form
   42,871.83/64,317.15 = 14,407.77/x
3. Step 3: Cross multiply
   42,871.83x = 64,317.15 × 14,407.77
4. Step 4: Simplify right side
   42,871.83x = 926,666,463.07
5. Step 5: Solve for x
   x = 926,666,463.07/42,871.83
6. Step 6: Final answer
   x = 21,614.81