Finding the Fourth Proportional to 1,870.31, 2,580.95 and 1,103.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.31 : 2,580.95 = 1,103.77 : x
2. Step 2: Convert to fraction form
   1,870.31/2,580.95 = 1,103.77/x
3. Step 3: Cross multiply
   1,870.31x = 2,580.95 × 1,103.77
4. Step 4: Simplify right side
   1,870.31x = 2,848,756.76
5. Step 5: Solve for x
   x = 2,848,756.76/1,870.31
6. Step 6: Final answer
   x = 1,523.15