Finding the Fourth Proportional to 39,573.42, 59,360.16 and 13,278.09

Step by Step Solution

1. Step 1: Write the proportion equation
   39,573.42 : 59,360.16 = 13,278.09 : x
2. Step 2: Convert to fraction form
   39,573.42/59,360.16 = 13,278.09/x
3. Step 3: Cross multiply
   39,573.42x = 59,360.16 × 13,278.09
4. Step 4: Simplify right side
   39,573.42x = 788,189,546.89
5. Step 5: Solve for x
   x = 788,189,546.89/39,573.42
6. Step 6: Final answer
   x = 19,917.15