Finding the Fourth Proportional to 1,054.89, 1,455.84 and 635.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.89 : 1,455.84 = 635.31 : x
2. Step 2: Convert to fraction form
   1,054.89/1,455.84 = 635.31/x
3. Step 3: Cross multiply
   1,054.89x = 1,455.84 × 635.31
4. Step 4: Simplify right side
   1,054.89x = 924,909.71
5. Step 5: Solve for x
   x = 924,909.71/1,054.89
6. Step 6: Final answer
   x = 876.78