Finding the Fourth Proportional to 28,090.47, 42,141.98 and 10,560.45

Step by Step Solution

1. Step 1: Write the proportion equation
   28,090.47 : 42,141.98 = 10,560.45 : x
2. Step 2: Convert to fraction form
   28,090.47/42,141.98 = 10,560.45/x
3. Step 3: Cross multiply
   28,090.47x = 42,141.98 × 10,560.45
4. Step 4: Simplify right side
   28,090.47x = 445,038,272.69
5. Step 5: Solve for x
   x = 445,038,272.69/28,090.47
6. Step 6: Final answer
   x = 15,843.03