Finding the Fourth Proportional to 31,037.94, 42,808.82 and 21,493.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,037.94 : 42,808.82 = 21,493.77 : x
2. Step 2: Convert to fraction form
   31,037.94/42,808.82 = 21,493.77/x
3. Step 3: Cross multiply
   31,037.94x = 42,808.82 × 21,493.77
4. Step 4: Simplify right side
   31,037.94x = 920,122,823.58
5. Step 5: Solve for x
   x = 920,122,823.58/31,037.94
6. Step 6: Final answer
   x = 29,645.10