Finding the Fourth Proportional to 12,261.98, 18,389.67 and 5,238.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,261.98 : 18,389.67 = 5,238.51 : x
2. Step 2: Convert to fraction form
   12,261.98/18,389.67 = 5,238.51/x
3. Step 3: Cross multiply
   12,261.98x = 18,389.67 × 5,238.51
4. Step 4: Simplify right side
   12,261.98x = 96,334,381.59
5. Step 5: Solve for x
   x = 96,334,381.59/12,261.98
6. Step 6: Final answer
   x = 7,856.35