Finding the Fourth Proportional to 686,025,900.72, 1,029,061,053.29 and 326,585,219.88

Step by Step Solution

1. Step 1: Write the proportion equation
   686,025,900.72 : 1,029,061,053.29 = 326,585,219.88 : x
2. Step 2: Convert to fraction form
   686,025,900.72/1,029,061,053.29 = 326,585,219.88/x
3. Step 3: Cross multiply
   686,025,900.72x = 1,029,061,053.29 × 326,585,219.88
4. Step 4: Simplify right side
   686,025,900.72x = 336,076,130,357,026,112
5. Step 5: Solve for x
   x = 336,076,130,357,026,112/686,025,900.72
6. Step 6: Final answer
   x = 489,888,399.26