Finding the Fourth Proportional to 91,128.42, 136,676.87 and 41,196.90

Step by Step Solution

1. Step 1: Write the proportion equation
   91,128.42 : 136,676.87 = 41,196.90 : x
2. Step 2: Convert to fraction form
   91,128.42/136,676.87 = 41,196.90/x
3. Step 3: Cross multiply
   91,128.42x = 136,676.87 × 41,196.90
4. Step 4: Simplify right side
   91,128.42x = 5,630,663,345.70
5. Step 5: Solve for x
   x = 5,630,663,345.70/91,128.42
6. Step 6: Final answer
   x = 61,788.23