Finding the Fourth Proportional to 28,399.41, 39,164.61 and 22,445.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,399.41 : 39,164.61 = 22,445.30 : x
2. Step 2: Convert to fraction form
   28,399.41/39,164.61 = 22,445.30/x
3. Step 3: Cross multiply
   28,399.41x = 39,164.61 × 22,445.30
4. Step 4: Simplify right side
   28,399.41x = 879,061,602.91
5. Step 5: Solve for x
   x = 879,061,602.91/28,399.41
6. Step 6: Final answer
   x = 30,953.52