Finding the Fourth Proportional to 21,389.01, 29,510.81 and 12,774.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,389.01 : 29,510.81 = 12,774.18 : x
2. Step 2: Convert to fraction form
   21,389.01/29,510.81 = 12,774.18/x
3. Step 3: Cross multiply
   21,389.01x = 29,510.81 × 12,774.18
4. Step 4: Simplify right side
   21,389.01x = 376,976,374.66
5. Step 5: Solve for x
   x = 376,976,374.66/21,389.01
6. Step 6: Final answer
   x = 17,624.77