Finding the Fourth Proportional to 1,671.77, 2,307.89 and 1,538.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.77 : 2,307.89 = 1,538.39 : x
2. Step 2: Convert to fraction form
   1,671.77/2,307.89 = 1,538.39/x
3. Step 3: Cross multiply
   1,671.77x = 2,307.89 × 1,538.39
4. Step 4: Simplify right side
   1,671.77x = 3,550,444.51
5. Step 5: Solve for x
   x = 3,550,444.51/1,671.77
6. Step 6: Final answer
   x = 2,123.76