Finding the Fourth Proportional to 9,713.76, 14,570.94 and 3,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,713.76 : 14,570.94 = 3,139.98 : x
2. Step 2: Convert to fraction form
   9,713.76/14,570.94 = 3,139.98/x
3. Step 3: Cross multiply
   9,713.76x = 14,570.94 × 3,139.98
4. Step 4: Simplify right side
   9,713.76x = 45,752,460.18
5. Step 5: Solve for x
   x = 45,752,460.18/9,713.76
6. Step 6: Final answer
   x = 4,710.07