Finding the Fourth Proportional to 1,870.42, 2,803.11 and 715.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.42 : 2,803.11 = 715.54 : x
2. Step 2: Convert to fraction form
   1,870.42/2,803.11 = 715.54/x
3. Step 3: Cross multiply
   1,870.42x = 2,803.11 × 715.54
4. Step 4: Simplify right side
   1,870.42x = 2,005,737.33
5. Step 5: Solve for x
   x = 2,005,737.33/1,870.42
6. Step 6: Final answer
   x = 1,072.35