Finding the Fourth Proportional to 12,921.39, 17,830.71 and 7,254.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.39 : 17,830.71 = 7,254.93 : x
2. Step 2: Convert to fraction form
   12,921.39/17,830.71 = 7,254.93/x
3. Step 3: Cross multiply
   12,921.39x = 17,830.71 × 7,254.93
4. Step 4: Simplify right side
   12,921.39x = 129,360,552.90
5. Step 5: Solve for x
   x = 129,360,552.90/12,921.39
6. Step 6: Final answer
   x = 10,011.35