Finding the Fourth Proportional to 12,538.74, 18,791.72 and 5,134.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,538.74 : 18,791.72 = 5,134.76 : x
2. Step 2: Convert to fraction form
   12,538.74/18,791.72 = 5,134.76/x
3. Step 3: Cross multiply
   12,538.74x = 18,791.72 × 5,134.76
4. Step 4: Simplify right side
   12,538.74x = 96,490,852.55
5. Step 5: Solve for x
   x = 96,490,852.55/12,538.74
6. Step 6: Final answer
   x = 7,695.42