Finding the Fourth Proportional to 43,492.91, 65,128.59 and 28,656.86

Step by Step Solution

1. Step 1: Write the proportion equation
   43,492.91 : 65,128.59 = 28,656.86 : x
2. Step 2: Convert to fraction form
   43,492.91/65,128.59 = 28,656.86/x
3. Step 3: Cross multiply
   43,492.91x = 65,128.59 × 28,656.86
4. Step 4: Simplify right side
   43,492.91x = 1,866,380,559.98
5. Step 5: Solve for x
   x = 1,866,380,559.98/43,492.91
6. Step 6: Final answer
   x = 42,912.30