Finding the Fourth Proportional to 899,904.96, 1,242,181.59 and 518,083.92

Step by Step Solution

1. Step 1: Write the proportion equation
   899,904.96 : 1,242,181.59 = 518,083.92 : x
2. Step 2: Convert to fraction form
   899,904.96/1,242,181.59 = 518,083.92/x
3. Step 3: Cross multiply
   899,904.96x = 1,242,181.59 × 518,083.92
4. Step 4: Simplify right side
   899,904.96x = 643,554,307,499.03
5. Step 5: Solve for x
   x = 643,554,307,499.03/899,904.96
6. Step 6: Final answer
   x = 715,135.86