Finding the Fourth Proportional to 31,790.88, 47,670.12 and 12,054.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,790.88 : 47,670.12 = 12,054.42 : x
2. Step 2: Convert to fraction form
   31,790.88/47,670.12 = 12,054.42/x
3. Step 3: Cross multiply
   31,790.88x = 47,670.12 × 12,054.42
4. Step 4: Simplify right side
   31,790.88x = 574,635,647.93
5. Step 5: Solve for x
   x = 574,635,647.93/31,790.88
6. Step 6: Final answer
   x = 18,075.49