Finding the Fourth Proportional to 145,111.37, 217,625.73 and 56,345.90

Step by Step Solution

1. Step 1: Write the proportion equation
   145,111.37 : 217,625.73 = 56,345.90 : x
2. Step 2: Convert to fraction form
   145,111.37/217,625.73 = 56,345.90/x
3. Step 3: Cross multiply
   145,111.37x = 217,625.73 × 56,345.90
4. Step 4: Simplify right side
   145,111.37x = 12,262,317,620.01
5. Step 5: Solve for x
   x = 12,262,317,620.01/145,111.37
6. Step 6: Final answer
   x = 84,502.80