Finding the Fourth Proportional to 31,504.90, 43,477.55 and 19,400.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,504.90 : 43,477.55 = 19,400.80 : x
2. Step 2: Convert to fraction form
   31,504.90/43,477.55 = 19,400.80/x
3. Step 3: Cross multiply
   31,504.90x = 43,477.55 × 19,400.80
4. Step 4: Simplify right side
   31,504.90x = 843,499,155.04
5. Step 5: Solve for x
   x = 843,499,155.04/31,504.90
6. Step 6: Final answer
   x = 26,773.59