Finding the Fourth Proportional to 12,955.48, 17,878.12 and 7,290.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.48 : 17,878.12 = 7,290.34 : x
2. Step 2: Convert to fraction form
   12,955.48/17,878.12 = 7,290.34/x
3. Step 3: Cross multiply
   12,955.48x = 17,878.12 × 7,290.34
4. Step 4: Simplify right side
   12,955.48x = 130,337,573.36
5. Step 5: Solve for x
   x = 130,337,573.36/12,955.48
6. Step 6: Final answer
   x = 10,060.42