Finding the Fourth Proportional to 21,048.51, 29,050.71 and 12,551.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,048.51 : 29,050.71 = 12,551.18 : x
2. Step 2: Convert to fraction form
   21,048.51/29,050.71 = 12,551.18/x
3. Step 3: Cross multiply
   21,048.51x = 29,050.71 × 12,551.18
4. Step 4: Simplify right side
   21,048.51x = 364,620,690.34
5. Step 5: Solve for x
   x = 364,620,690.34/21,048.51
6. Step 6: Final answer
   x = 17,322.87