Finding the Fourth Proportional to 880,897.89, 1,215,618.39 and 513,351.48

Step by Step Solution

1. Step 1: Write the proportion equation
   880,897.89 : 1,215,618.39 = 513,351.48 : x
2. Step 2: Convert to fraction form
   880,897.89/1,215,618.39 = 513,351.48/x
3. Step 3: Cross multiply
   880,897.89x = 1,215,618.39 × 513,351.48
4. Step 4: Simplify right side
   880,897.89x = 624,039,499,621.72
5. Step 5: Solve for x
   x = 624,039,499,621.72/880,897.89
6. Step 6: Final answer
   x = 708,412.98