Finding the Fourth Proportional to 21,498.53, 29,667.98 and 12,070.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.53 : 29,667.98 = 12,070.13 : x
2. Step 2: Convert to fraction form
   21,498.53/29,667.98 = 12,070.13/x
3. Step 3: Cross multiply
   21,498.53x = 29,667.98 × 12,070.13
4. Step 4: Simplify right side
   21,498.53x = 358,096,315.09
5. Step 5: Solve for x
   x = 358,096,315.09/21,498.53
6. Step 6: Final answer
   x = 16,656.78