Finding the Fourth Proportional to 3,507.31, 5,261.88 and 1,042.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,507.31 : 5,261.88 = 1,042.12 : x
2. Step 2: Convert to fraction form
   3,507.31/5,261.88 = 1,042.12/x
3. Step 3: Cross multiply
   3,507.31x = 5,261.88 × 1,042.12
4. Step 4: Simplify right side
   3,507.31x = 5,483,510.39
5. Step 5: Solve for x
   x = 5,483,510.39/3,507.31
6. Step 6: Final answer
   x = 1,563.45