Finding the Fourth Proportional to 1,875.86, 2,812.73 and 779.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,875.86 : 2,812.73 = 779.63 : x
2. Step 2: Convert to fraction form
   1,875.86/2,812.73 = 779.63/x
3. Step 3: Cross multiply
   1,875.86x = 2,812.73 × 779.63
4. Step 4: Simplify right side
   1,875.86x = 2,192,870.73
5. Step 5: Solve for x
   x = 2,192,870.73/1,875.86
6. Step 6: Final answer
   x = 1,169.00