Finding the Fourth Proportional to 91,949.61, 137,826.41 and 52,421.61

Step by Step Solution

1. Step 1: Write the proportion equation
   91,949.61 : 137,826.41 = 52,421.61 : x
2. Step 2: Convert to fraction form
   91,949.61/137,826.41 = 52,421.61/x
3. Step 3: Cross multiply
   91,949.61x = 137,826.41 × 52,421.61
4. Step 4: Simplify right side
   91,949.61x = 7,225,082,050.61
5. Step 5: Solve for x
   x = 7,225,082,050.61/91,949.61
6. Step 6: Final answer
   x = 78,576.54