Finding the Fourth Proportional to 12,757.86, 19,129.76 and 4,748.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,757.86 : 19,129.76 = 4,748.58 : x
2. Step 2: Convert to fraction form
   12,757.86/19,129.76 = 4,748.58/x
3. Step 3: Cross multiply
   12,757.86x = 19,129.76 × 4,748.58
4. Step 4: Simplify right side
   12,757.86x = 90,839,172.00
5. Step 5: Solve for x
   x = 90,839,172.00/12,757.86
6. Step 6: Final answer
   x = 7,120.25