Finding the Fourth Proportional to 73,989.59, 110,990.45 and 31,870.67

Step by Step Solution

1. Step 1: Write the proportion equation
   73,989.59 : 110,990.45 = 31,870.67 : x
2. Step 2: Convert to fraction form
   73,989.59/110,990.45 = 31,870.67/x
3. Step 3: Cross multiply
   73,989.59x = 110,990.45 × 31,870.67
4. Step 4: Simplify right side
   73,989.59x = 3,537,339,529.83
5. Step 5: Solve for x
   x = 3,537,339,529.83/73,989.59
6. Step 6: Final answer
   x = 47,808.61