Finding the Fourth Proportional to 357,093.51, 493,019.88 and 221,271.59

Step by Step Solution

1. Step 1: Write the proportion equation
   357,093.51 : 493,019.88 = 221,271.59 : x
2. Step 2: Convert to fraction form
   357,093.51/493,019.88 = 221,271.59/x
3. Step 3: Cross multiply
   357,093.51x = 493,019.88 × 221,271.59
4. Step 4: Simplify right side
   357,093.51x = 109,091,290,837.29
5. Step 5: Solve for x
   x = 109,091,290,837.29/357,093.51
6. Step 6: Final answer
   x = 305,497.83