Finding the Fourth Proportional to 13,211.39, 19,811.31 and 4,997.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,211.39 : 19,811.31 = 4,997.63 : x
2. Step 2: Convert to fraction form
   13,211.39/19,811.31 = 4,997.63/x
3. Step 3: Cross multiply
   13,211.39x = 19,811.31 × 4,997.63
4. Step 4: Simplify right side
   13,211.39x = 99,009,498.14
5. Step 5: Solve for x
   x = 99,009,498.14/13,211.39
6. Step 6: Final answer
   x = 7,494.26