Finding the Fourth Proportional to 13,259.82, 19,886.93 and 3,897.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,259.82 : 19,886.93 = 3,897.29 : x
2. Step 2: Convert to fraction form
   13,259.82/19,886.93 = 3,897.29/x
3. Step 3: Cross multiply
   13,259.82x = 19,886.93 × 3,897.29
4. Step 4: Simplify right side
   13,259.82x = 77,505,111.37
5. Step 5: Solve for x
   x = 77,505,111.37/13,259.82
6. Step 6: Final answer
   x = 5,845.11