Finding the Fourth Proportional to 1,385.10, 1,907.55 and 1,354.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.10 : 1,907.55 = 1,354.86 : x
2. Step 2: Convert to fraction form
   1,385.10/1,907.55 = 1,354.86/x
3. Step 3: Cross multiply
   1,385.10x = 1,907.55 × 1,354.86
4. Step 4: Simplify right side
   1,385.10x = 2,584,463.19
5. Step 5: Solve for x
   x = 2,584,463.19/1,385.10
6. Step 6: Final answer
   x = 1,865.90