Finding the Fourth Proportional to 104,064.42, 143,608.89 and 56,317.78

Step by Step Solution

1. Step 1: Write the proportion equation
   104,064.42 : 143,608.89 = 56,317.78 : x
2. Step 2: Convert to fraction form
   104,064.42/143,608.89 = 56,317.78/x
3. Step 3: Cross multiply
   104,064.42x = 143,608.89 × 56,317.78
4. Step 4: Simplify right side
   104,064.42x = 8,087,733,514.04
5. Step 5: Solve for x
   x = 8,087,733,514.04/104,064.42
6. Step 6: Final answer
   x = 77,718.53