Finding the Fourth Proportional to 13,134.72, 19,706.07 and 7,875.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,134.72 : 19,706.07 = 7,875.57 : x
2. Step 2: Convert to fraction form
   13,134.72/19,706.07 = 7,875.57/x
3. Step 3: Cross multiply
   13,134.72x = 19,706.07 × 7,875.57
4. Step 4: Simplify right side
   13,134.72x = 155,196,533.71
5. Step 5: Solve for x
   x = 155,196,533.71/13,134.72
6. Step 6: Final answer
   x = 11,815.75