Finding the Fourth Proportional to 42,966.16, 64,444.46 and 13,381.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,966.16 : 64,444.46 = 13,381.52 : x
2. Step 2: Convert to fraction form
   42,966.16/64,444.46 = 13,381.52/x
3. Step 3: Cross multiply
   42,966.16x = 64,444.46 × 13,381.52
4. Step 4: Simplify right side
   42,966.16x = 862,364,830.38
5. Step 5: Solve for x
   x = 862,364,830.38/42,966.16
6. Step 6: Final answer
   x = 20,070.79