Finding the Fourth Proportional to 1,345.56, 2,017.60 and 906.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.56 : 2,017.60 = 906.79 : x
2. Step 2: Convert to fraction form
   1,345.56/2,017.60 = 906.79/x
3. Step 3: Cross multiply
   1,345.56x = 2,017.60 × 906.79
4. Step 4: Simplify right side
   1,345.56x = 1,829,539.50
5. Step 5: Solve for x
   x = 1,829,539.50/1,345.56
6. Step 6: Final answer
   x = 1,359.69