Finding the Fourth Proportional to 1,059.17, 1,588.43 and 648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.17 : 1,588.43 = 648.50 : x
2. Step 2: Convert to fraction form
   1,059.17/1,588.43 = 648.50/x
3. Step 3: Cross multiply
   1,059.17x = 1,588.43 × 648.50
4. Step 4: Simplify right side
   1,059.17x = 1,030,085.67
5. Step 5: Solve for x
   x = 1,030,085.67/1,059.17
6. Step 6: Final answer
   x = 972.55