Finding the Fourth Proportional to 1,091.88, 1,633.72 and 651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.88 : 1,633.72 = 651.50 : x
2. Step 2: Convert to fraction form
   1,091.88/1,633.72 = 651.50/x
3. Step 3: Cross multiply
   1,091.88x = 1,633.72 × 651.50
4. Step 4: Simplify right side
   1,091.88x = 1,064,368.58
5. Step 5: Solve for x
   x = 1,064,368.58/1,091.88
6. Step 6: Final answer
   x = 974.80