Finding the Fourth Proportional to 42,887.57, 64,302.63 and 16,561.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,887.57 : 64,302.63 = 16,561.56 : x
2. Step 2: Convert to fraction form
   42,887.57/64,302.63 = 16,561.56/x
3. Step 3: Cross multiply
   42,887.57x = 64,302.63 × 16,561.56
4. Step 4: Simplify right side
   42,887.57x = 1,064,951,782.10
5. Step 5: Solve for x
   x = 1,064,951,782.10/42,887.57
6. Step 6: Final answer
   x = 24,831.25