Finding the Fourth Proportional to 13,935.51, 19,230.81 and 7,647.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,935.51 : 19,230.81 = 7,647.89 : x
2. Step 2: Convert to fraction form
   13,935.51/19,230.81 = 7,647.89/x
3. Step 3: Cross multiply
   13,935.51x = 19,230.81 × 7,647.89
4. Step 4: Simplify right side
   13,935.51x = 147,075,023.34
5. Step 5: Solve for x
   x = 147,075,023.34/13,935.51
6. Step 6: Final answer
   x = 10,553.97