Finding the Fourth Proportional to 12,875.78, 19,300.35 and 7,317.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.78 : 19,300.35 = 7,317.15 : x
2. Step 2: Convert to fraction form
   12,875.78/19,300.35 = 7,317.15/x
3. Step 3: Cross multiply
   12,875.78x = 19,300.35 × 7,317.15
4. Step 4: Simplify right side
   12,875.78x = 141,223,528.56
5. Step 5: Solve for x
   x = 141,223,528.56/12,875.78
6. Step 6: Final answer
   x = 10,968.16