Finding the Fourth Proportional to 51,013.99, 76,520.89 and 13,574.06

Step by Step Solution

1. Step 1: Write the proportion equation
   51,013.99 : 76,520.89 = 13,574.06 : x
2. Step 2: Convert to fraction form
   51,013.99/76,520.89 = 13,574.06/x
3. Step 3: Cross multiply
   51,013.99x = 76,520.89 × 13,574.06
4. Step 4: Simplify right side
   51,013.99x = 1,038,699,427.51
5. Step 5: Solve for x
   x = 1,038,699,427.51/51,013.99
6. Step 6: Final answer
   x = 20,361.07