Finding the Fourth Proportional to 1,111.86, 1,534.50 and 669.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.86 : 1,534.50 = 669.87 : x
2. Step 2: Convert to fraction form
   1,111.86/1,534.50 = 669.87/x
3. Step 3: Cross multiply
   1,111.86x = 1,534.50 × 669.87
4. Step 4: Simplify right side
   1,111.86x = 1,027,915.52
5. Step 5: Solve for x
   x = 1,027,915.52/1,111.86
6. Step 6: Final answer
   x = 924.50