Finding the Fourth Proportional to 1,345.69, 1,857.57 and 897.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.69 : 1,857.57 = 897.39 : x
2. Step 2: Convert to fraction form
   1,345.69/1,857.57 = 897.39/x
3. Step 3: Cross multiply
   1,345.69x = 1,857.57 × 897.39
4. Step 4: Simplify right side
   1,345.69x = 1,666,971.77
5. Step 5: Solve for x
   x = 1,666,971.77/1,345.69
6. Step 6: Final answer
   x = 1,238.75