Finding the Fourth Proportional to 31,900.74, 47,852.91 and 12,180.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,900.74 : 47,852.91 = 12,180.87 : x
2. Step 2: Convert to fraction form
   31,900.74/47,852.91 = 12,180.87/x
3. Step 3: Cross multiply
   31,900.74x = 47,852.91 × 12,180.87
4. Step 4: Simplify right side
   31,900.74x = 582,890,075.83
5. Step 5: Solve for x
   x = 582,890,075.83/31,900.74
6. Step 6: Final answer
   x = 18,271.99