Finding the Fourth Proportional to 31,152.25, 43,009.55 and 19,993.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.25 : 43,009.55 = 19,993.69 : x
2. Step 2: Convert to fraction form
   31,152.25/43,009.55 = 19,993.69/x
3. Step 3: Cross multiply
   31,152.25x = 43,009.55 × 19,993.69
4. Step 4: Simplify right side
   31,152.25x = 859,919,609.74
5. Step 5: Solve for x
   x = 859,919,609.74/31,152.25
6. Step 6: Final answer
   x = 27,603.77