Finding the Fourth Proportional to 12,477.51, 17,221.86 and 7,175.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.51 : 17,221.86 = 7,175.39 : x
2. Step 2: Convert to fraction form
   12,477.51/17,221.86 = 7,175.39/x
3. Step 3: Cross multiply
   12,477.51x = 17,221.86 × 7,175.39
4. Step 4: Simplify right side
   12,477.51x = 123,573,501.03
5. Step 5: Solve for x
   x = 123,573,501.03/12,477.51
6. Step 6: Final answer
   x = 9,903.70