Finding the Fourth Proportional to 21,054.83, 29,060.55 and 13,886.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.83 : 29,060.55 = 13,886.04 : x
2. Step 2: Convert to fraction form
   21,054.83/29,060.55 = 13,886.04/x
3. Step 3: Cross multiply
   21,054.83x = 29,060.55 × 13,886.04
4. Step 4: Simplify right side
   21,054.83x = 403,535,959.72
5. Step 5: Solve for x
   x = 403,535,959.72/21,054.83
6. Step 6: Final answer
   x = 19,165.96