Finding the Fourth Proportional to 1,345.47, 1,855.76 and 1,013.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.47 : 1,855.76 = 1,013.91 : x
2. Step 2: Convert to fraction form
   1,345.47/1,855.76 = 1,013.91/x
3. Step 3: Cross multiply
   1,345.47x = 1,855.76 × 1,013.91
4. Step 4: Simplify right side
   1,345.47x = 1,881,568.55
5. Step 5: Solve for x
   x = 1,881,568.55/1,345.47
6. Step 6: Final answer
   x = 1,398.45