Finding the Fourth Proportional to 28,196.63, 42,297.80 and 10,431.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28,196.63 : 42,297.80 = 10,431.98 : x
2. Step 2: Convert to fraction form
   28,196.63/42,297.80 = 10,431.98/x
3. Step 3: Cross multiply
   28,196.63x = 42,297.80 × 10,431.98
4. Step 4: Simplify right side
   28,196.63x = 441,249,540.00
5. Step 5: Solve for x
   x = 441,249,540.00/28,196.63
6. Step 6: Final answer
   x = 15,649.02