Finding the Fourth Proportional to 1,870.48, 2,803.80 and 1,047.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.48 : 2,803.80 = 1,047.76 : x
2. Step 2: Convert to fraction form
   1,870.48/2,803.80 = 1,047.76/x
3. Step 3: Cross multiply
   1,870.48x = 2,803.80 × 1,047.76
4. Step 4: Simplify right side
   1,870.48x = 2,937,709.49
5. Step 5: Solve for x
   x = 2,937,709.49/1,870.48
6. Step 6: Final answer
   x = 1,570.56