Finding the Fourth Proportional to 2,715.60, 4,071.84 and 1,156.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.60 : 4,071.84 = 1,156.72 : x
2. Step 2: Convert to fraction form
   2,715.60/4,071.84 = 1,156.72/x
3. Step 3: Cross multiply
   2,715.60x = 4,071.84 × 1,156.72
4. Step 4: Simplify right side
   2,715.60x = 4,709,978.76
5. Step 5: Solve for x
   x = 4,709,978.76/2,715.60
6. Step 6: Final answer
   x = 1,734.42