Finding the Fourth Proportional to 31,070.80, 42,879.72 and 18,493.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,070.80 : 42,879.72 = 18,493.84 : x
2. Step 2: Convert to fraction form
   31,070.80/42,879.72 = 18,493.84/x
3. Step 3: Cross multiply
   31,070.80x = 42,879.72 × 18,493.84
4. Step 4: Simplify right side
   31,070.80x = 793,010,680.92
5. Step 5: Solve for x
   x = 793,010,680.92/31,070.80
6. Step 6: Final answer
   x = 25,522.70