Finding the Fourth Proportional to 65,826.42, 90,803.52 and 40,345.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,826.42 : 90,803.52 = 40,345.12 : x
2. Step 2: Convert to fraction form
   65,826.42/90,803.52 = 40,345.12/x
3. Step 3: Cross multiply
   65,826.42x = 90,803.52 × 40,345.12
4. Step 4: Simplify right side
   65,826.42x = 3,663,478,910.82
5. Step 5: Solve for x
   x = 3,663,478,910.82/65,826.42
6. Step 6: Final answer
   x = 55,653.63