Finding the Fourth Proportional to 291,105.12, 401,726.72 and 163,782.88

Step by Step Solution

1. Step 1: Write the proportion equation
   291,105.12 : 401,726.72 = 163,782.88 : x
2. Step 2: Convert to fraction form
   291,105.12/401,726.72 = 163,782.88/x
3. Step 3: Cross multiply
   291,105.12x = 401,726.72 × 163,782.88
4. Step 4: Simplify right side
   291,105.12x = 65,795,959,174.55
5. Step 5: Solve for x
   x = 65,795,959,174.55/291,105.12
6. Step 6: Final answer
   x = 226,021.31