Finding the Fourth Proportional to 141,128.72, 211,734.61 and 56,845.51

Step by Step Solution

1. Step 1: Write the proportion equation
   141,128.72 : 211,734.61 = 56,845.51 : x
2. Step 2: Convert to fraction form
   141,128.72/211,734.61 = 56,845.51/x
3. Step 3: Cross multiply
   141,128.72x = 211,734.61 × 56,845.51
4. Step 4: Simplify right side
   141,128.72x = 12,036,161,218.65
5. Step 5: Solve for x
   x = 12,036,161,218.65/141,128.72
6. Step 6: Final answer
   x = 85,284.99