Finding the Fourth Proportional to 145,162.47, 217,658.94 and 56,312.15

Step by Step Solution

1. Step 1: Write the proportion equation
   145,162.47 : 217,658.94 = 56,312.15 : x
2. Step 2: Convert to fraction form
   145,162.47/217,658.94 = 56,312.15/x
3. Step 3: Cross multiply
   145,162.47x = 217,658.94 × 56,312.15
4. Step 4: Simplify right side
   145,162.47x = 12,256,841,789.83
5. Step 5: Solve for x
   x = 12,256,841,789.83/145,162.47
6. Step 6: Final answer
   x = 84,435.34