Finding the Fourth Proportional to 3,118.47, 4,302.74 and 1,858.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,118.47 : 4,302.74 = 1,858.72 : x
2. Step 2: Convert to fraction form
   3,118.47/4,302.74 = 1,858.72/x
3. Step 3: Cross multiply
   3,118.47x = 4,302.74 × 1,858.72
4. Step 4: Simplify right side
   3,118.47x = 7,997,588.89
5. Step 5: Solve for x
   x = 7,997,588.89/3,118.47
6. Step 6: Final answer
   x = 2,564.59