Finding the Fourth Proportional to 1,345.98, 1,855.50 and 972.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.98 : 1,855.50 = 972.37 : x
2. Step 2: Convert to fraction form
   1,345.98/1,855.50 = 972.37/x
3. Step 3: Cross multiply
   1,345.98x = 1,855.50 × 972.37
4. Step 4: Simplify right side
   1,345.98x = 1,804,227.90
5. Step 5: Solve for x
   x = 1,804,227.90/1,345.98
6. Step 6: Final answer
   x = 1,340.46