Finding the Fourth Proportional to 661,051.72, 911,940.24 and 479,365.12

Step by Step Solution

1. Step 1: Write the proportion equation
   661,051.72 : 911,940.24 = 479,365.12 : x
2. Step 2: Convert to fraction form
   661,051.72/911,940.24 = 479,365.12/x
3. Step 3: Cross multiply
   661,051.72x = 911,940.24 × 479,365.12
4. Step 4: Simplify right side
   661,051.72x = 437,152,342,580.43
5. Step 5: Solve for x
   x = 437,152,342,580.43/661,051.72
6. Step 6: Final answer
   x = 661,298.25