Finding the Fourth Proportional to 12,955.05, 17,877.55 and 7,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.05 : 17,877.55 = 7,290.12 : x
2. Step 2: Convert to fraction form
   12,955.05/17,877.55 = 7,290.12/x
3. Step 3: Cross multiply
   12,955.05x = 17,877.55 × 7,290.12
4. Step 4: Simplify right side
   12,955.05x = 130,329,484.81
5. Step 5: Solve for x
   x = 130,329,484.81/12,955.05
6. Step 6: Final answer
   x = 10,060.13