Finding the Fourth Proportional to 1,070.12, 1,596.46 and 1,042.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.12 : 1,596.46 = 1,042.99 : x
2. Step 2: Convert to fraction form
   1,070.12/1,596.46 = 1,042.99/x
3. Step 3: Cross multiply
   1,070.12x = 1,596.46 × 1,042.99
4. Step 4: Simplify right side
   1,070.12x = 1,665,091.82
5. Step 5: Solve for x
   x = 1,665,091.82/1,070.12
6. Step 6: Final answer
   x = 1,555.99