Finding the Fourth Proportional to 1,507.05, 2,259.36 and 1,385.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.05 : 2,259.36 = 1,385.55 : x
2. Step 2: Convert to fraction form
   1,507.05/2,259.36 = 1,385.55/x
3. Step 3: Cross multiply
   1,507.05x = 2,259.36 × 1,385.55
4. Step 4: Simplify right side
   1,507.05x = 3,130,456.25
5. Step 5: Solve for x
   x = 3,130,456.25/1,507.05
6. Step 6: Final answer
   x = 2,077.21