Finding the Fourth Proportional to 1,036,680.58, 1,554,915.72 and 278,423.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036,680.58 : 1,554,915.72 = 278,423.50 : x
2. Step 2: Convert to fraction form
   1,036,680.58/1,554,915.72 = 278,423.50/x
3. Step 3: Cross multiply
   1,036,680.58x = 1,554,915.72 × 278,423.50
4. Step 4: Simplify right side
   1,036,680.58x = 432,925,076,967.42
5. Step 5: Solve for x
   x = 432,925,076,967.42/1,036,680.58
6. Step 6: Final answer
   x = 417,607.01