Finding the Fourth Proportional to 2,748.31, 4,123.62 and 1,187.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.31 : 4,123.62 = 1,187.51 : x
2. Step 2: Convert to fraction form
   2,748.31/4,123.62 = 1,187.51/x
3. Step 3: Cross multiply
   2,748.31x = 4,123.62 × 1,187.51
4. Step 4: Simplify right side
   2,748.31x = 4,896,826.71
5. Step 5: Solve for x
   x = 4,896,826.71/2,748.31
6. Step 6: Final answer
   x = 1,781.76