Finding the Fourth Proportional to 1,510.89, 2,085.12 and 847.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.89 : 2,085.12 = 847.86 : x
2. Step 2: Convert to fraction form
   1,510.89/2,085.12 = 847.86/x
3. Step 3: Cross multiply
   1,510.89x = 2,085.12 × 847.86
4. Step 4: Simplify right side
   1,510.89x = 1,767,889.84
5. Step 5: Solve for x
   x = 1,767,889.84/1,510.89
6. Step 6: Final answer
   x = 1,170.10