Finding the Fourth Proportional to 30,749.31, 42,433.28 and 17,319.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30,749.31 : 42,433.28 = 17,319.76 : x
2. Step 2: Convert to fraction form
   30,749.31/42,433.28 = 17,319.76/x
3. Step 3: Cross multiply
   30,749.31x = 42,433.28 × 17,319.76
4. Step 4: Simplify right side
   30,749.31x = 734,934,225.61
5. Step 5: Solve for x
   x = 734,934,225.61/30,749.31
6. Step 6: Final answer
   x = 23,900.84