Finding the Fourth Proportional to 9,139.68, 13,698.72 and 4,973.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.68 : 13,698.72 = 4,973.76 : x
2. Step 2: Convert to fraction form
   9,139.68/13,698.72 = 4,973.76/x
3. Step 3: Cross multiply
   9,139.68x = 13,698.72 × 4,973.76
4. Step 4: Simplify right side
   9,139.68x = 68,134,145.59
5. Step 5: Solve for x
   x = 68,134,145.59/9,139.68
6. Step 6: Final answer
   x = 7,454.76