Finding the Fourth Proportional to 7,274.58, 10,039.86 and 4,131.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,274.58 : 10,039.86 = 4,131.78 : x
2. Step 2: Convert to fraction form
   7,274.58/10,039.86 = 4,131.78/x
3. Step 3: Cross multiply
   7,274.58x = 10,039.86 × 4,131.78
4. Step 4: Simplify right side
   7,274.58x = 41,482,492.75
5. Step 5: Solve for x
   x = 41,482,492.75/7,274.58
6. Step 6: Final answer
   x = 5,702.39