Finding the Fourth Proportional to 13,888.72, 19,167.60 and 7,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,888.72 : 19,167.60 = 7,601.50 : x
2. Step 2: Convert to fraction form
   13,888.72/19,167.60 = 7,601.50/x
3. Step 3: Cross multiply
   13,888.72x = 19,167.60 × 7,601.50
4. Step 4: Simplify right side
   13,888.72x = 145,702,511.40
5. Step 5: Solve for x
   x = 145,702,511.40/13,888.72
6. Step 6: Final answer
   x = 10,490.71