Finding the Fourth Proportional to 46,570.81, 69,868.01 and 13,291

Step by Step Solution

1. Step 1: Write the proportion equation
   46,570.81 : 69,868.01 = 13,291 : x
2. Step 2: Convert to fraction form
   46,570.81/69,868.01 = 13,291/x
3. Step 3: Cross multiply
   46,570.81x = 69,868.01 × 13,291
4. Step 4: Simplify right side
   46,570.81x = 928,615,720.91
5. Step 5: Solve for x
   x = 928,615,720.91/46,570.81
6. Step 6: Final answer
   x = 19,939.87