Finding the Fourth Proportional to 12,355.43, 17,051.72 and 7,051.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.43 : 17,051.72 = 7,051.05 : x
2. Step 2: Convert to fraction form
   12,355.43/17,051.72 = 7,051.05/x
3. Step 3: Cross multiply
   12,355.43x = 17,051.72 × 7,051.05
4. Step 4: Simplify right side
   12,355.43x = 120,232,486.75
5. Step 5: Solve for x
   x = 120,232,486.75/12,355.43
6. Step 6: Final answer
   x = 9,731.14