Finding the Fourth Proportional to 28,047.13, 42,059.76 and 10,507.39

Step by Step Solution

1. Step 1: Write the proportion equation
   28,047.13 : 42,059.76 = 10,507.39 : x
2. Step 2: Convert to fraction form
   28,047.13/42,059.76 = 10,507.39/x
3. Step 3: Cross multiply
   28,047.13x = 42,059.76 × 10,507.39
4. Step 4: Simplify right side
   28,047.13x = 441,938,301.63
5. Step 5: Solve for x
   x = 441,938,301.63/28,047.13
6. Step 6: Final answer
   x = 15,756.99