Finding the Fourth Proportional to 42,986.46, 64,492.50 and 20,514.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,986.46 : 64,492.50 = 20,514.01 : x
2. Step 2: Convert to fraction form
   42,986.46/64,492.50 = 20,514.01/x
3. Step 3: Cross multiply
   42,986.46x = 64,492.50 × 20,514.01
4. Step 4: Simplify right side
   42,986.46x = 1,322,999,826.54
5. Step 5: Solve for x
   x = 1,322,999,826.54/42,986.46
6. Step 6: Final answer
   x = 30,777.13