Finding the Fourth Proportional to 22,777.42, 31,435.59 and 13,345.99

Step by Step Solution

1. Step 1: Write the proportion equation
   22,777.42 : 31,435.59 = 13,345.99 : x
2. Step 2: Convert to fraction form
   22,777.42/31,435.59 = 13,345.99/x
3. Step 3: Cross multiply
   22,777.42x = 31,435.59 × 13,345.99
4. Step 4: Simplify right side
   22,777.42x = 419,539,069.78
5. Step 5: Solve for x
   x = 419,539,069.78/22,777.42
6. Step 6: Final answer
   x = 18,419.08