Finding the Fourth Proportional to 291,018.42, 436,526.82 and 80,656.56

Step by Step Solution

1. Step 1: Write the proportion equation
   291,018.42 : 436,526.82 = 80,656.56 : x
2. Step 2: Convert to fraction form
   291,018.42/436,526.82 = 80,656.56/x
3. Step 3: Cross multiply
   291,018.42x = 436,526.82 × 80,656.56
4. Step 4: Simplify right side
   291,018.42x = 35,208,751,648.94
5. Step 5: Solve for x
   x = 35,208,751,648.94/291,018.42
6. Step 6: Final answer
   x = 120,984.62