Finding the Fourth Proportional to 630,978.66, 870,826.95 and 359,112.69

Step by Step Solution

1. Step 1: Write the proportion equation
   630,978.66 : 870,826.95 = 359,112.69 : x
2. Step 2: Convert to fraction form
   630,978.66/870,826.95 = 359,112.69/x
3. Step 3: Cross multiply
   630,978.66x = 870,826.95 × 359,112.69
4. Step 4: Simplify right side
   630,978.66x = 312,725,008,539.00
5. Step 5: Solve for x
   x = 312,725,008,539.00/630,978.66
6. Step 6: Final answer
   x = 495,618.99