Finding the Fourth Proportional to 1,985.08, 2,978.06 and 1,060.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.08 : 2,978.06 = 1,060.15 : x
2. Step 2: Convert to fraction form
   1,985.08/2,978.06 = 1,060.15/x
3. Step 3: Cross multiply
   1,985.08x = 2,978.06 × 1,060.15
4. Step 4: Simplify right side
   1,985.08x = 3,157,190.31
5. Step 5: Solve for x
   x = 3,157,190.31/1,985.08
6. Step 6: Final answer
   x = 1,590.46