Finding the Fourth Proportional to 1,407.77, 1,941.80 and 847.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.77 : 1,941.80 = 847.86 : x
2. Step 2: Convert to fraction form
   1,407.77/1,941.80 = 847.86/x
3. Step 3: Cross multiply
   1,407.77x = 1,941.80 × 847.86
4. Step 4: Simplify right side
   1,407.77x = 1,646,374.55
5. Step 5: Solve for x
   x = 1,646,374.55/1,407.77
6. Step 6: Final answer
   x = 1,169.49