Finding the Fourth Proportional to 291,105.02, 401,689.94 and 162,011.21

Step by Step Solution

1. Step 1: Write the proportion equation
   291,105.02 : 401,689.94 = 162,011.21 : x
2. Step 2: Convert to fraction form
   291,105.02/401,689.94 = 162,011.21/x
3. Step 3: Cross multiply
   291,105.02x = 401,689.94 × 162,011.21
4. Step 4: Simplify right side
   291,105.02x = 65,078,270,405.72
5. Step 5: Solve for x
   x = 65,078,270,405.72/291,105.02
6. Step 6: Final answer
   x = 223,555.99