Finding the Fourth Proportional to 40,992.76, 61,490.58 and 13,291

Step by Step Solution

1. Step 1: Write the proportion equation
   40,992.76 : 61,490.58 = 13,291 : x
2. Step 2: Convert to fraction form
   40,992.76/61,490.58 = 13,291/x
3. Step 3: Cross multiply
   40,992.76x = 61,490.58 × 13,291
4. Step 4: Simplify right side
   40,992.76x = 817,271,298.78
5. Step 5: Solve for x
   x = 817,271,298.78/40,992.76
6. Step 6: Final answer
   x = 19,936.97