Finding the Fourth Proportional to 21,543.16, 29,733.83 and 13,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,543.16 : 29,733.83 = 13,978.88 : x
2. Step 2: Convert to fraction form
   21,543.16/29,733.83 = 13,978.88/x
3. Step 3: Cross multiply
   21,543.16x = 29,733.83 × 13,978.88
4. Step 4: Simplify right side
   21,543.16x = 415,645,641.51
5. Step 5: Solve for x
   x = 415,645,641.51/21,543.16
6. Step 6: Final answer
   x = 19,293.62