Finding the Fourth Proportional to 212,005.91, 318,003.86 and 52,081.58

Step by Step Solution

1. Step 1: Write the proportion equation
   212,005.91 : 318,003.86 = 52,081.58 : x
2. Step 2: Convert to fraction form
   212,005.91/318,003.86 = 52,081.58/x
3. Step 3: Cross multiply
   212,005.91x = 318,003.86 × 52,081.58
4. Step 4: Simplify right side
   212,005.91x = 16,562,144,009.50
5. Step 5: Solve for x
   x = 16,562,144,009.50/212,005.91
6. Step 6: Final answer
   x = 78,121.14