Finding the Fourth Proportional to 13,889.95, 19,167.99 and 7,516.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,889.95 : 19,167.99 = 7,516.40 : x
2. Step 2: Convert to fraction form
   13,889.95/19,167.99 = 7,516.40/x
3. Step 3: Cross multiply
   13,889.95x = 19,167.99 × 7,516.40
4. Step 4: Simplify right side
   13,889.95x = 144,074,227.89
5. Step 5: Solve for x
   x = 144,074,227.89/13,889.95
6. Step 6: Final answer
   x = 10,372.55