Finding the Fourth Proportional to 91,285.75, 136,945.91 and 42,037.75

Step by Step Solution

1. Step 1: Write the proportion equation
   91,285.75 : 136,945.91 = 42,037.75 : x
2. Step 2: Convert to fraction form
   91,285.75/136,945.91 = 42,037.75/x
3. Step 3: Cross multiply
   91,285.75x = 136,945.91 × 42,037.75
4. Step 4: Simplify right side
   91,285.75x = 5,756,897,928.10
5. Step 5: Solve for x
   x = 5,756,897,928.10/91,285.75
6. Step 6: Final answer
   x = 63,064.58