Finding the Fourth Proportional to 1,870.86, 2,807.64 and 897.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.86 : 2,807.64 = 897.51 : x
2. Step 2: Convert to fraction form
   1,870.86/2,807.64 = 897.51/x
3. Step 3: Cross multiply
   1,870.86x = 2,807.64 × 897.51
4. Step 4: Simplify right side
   1,870.86x = 2,519,884.98
5. Step 5: Solve for x
   x = 2,519,884.98/1,870.86
6. Step 6: Final answer
   x = 1,346.91