Finding the Fourth Proportional to 438,103.32, 653,287.87 and 422,492.10

Step by Step Solution

1. Step 1: Write the proportion equation
   438,103.32 : 653,287.87 = 422,492.10 : x
2. Step 2: Convert to fraction form
   438,103.32/653,287.87 = 422,492.10/x
3. Step 3: Cross multiply
   438,103.32x = 653,287.87 × 422,492.10
4. Step 4: Simplify right side
   438,103.32x = 276,008,964,100.83
5. Step 5: Solve for x
   x = 276,008,964,100.83/438,103.32
6. Step 6: Final answer
   x = 630,008.84