Finding the Fourth Proportional to 740,300.42, 1,021,616.88 and 400,767.86

Step by Step Solution

1. Step 1: Write the proportion equation
   740,300.42 : 1,021,616.88 = 400,767.86 : x
2. Step 2: Convert to fraction form
   740,300.42/1,021,616.88 = 400,767.86/x
3. Step 3: Cross multiply
   740,300.42x = 1,021,616.88 × 400,767.86
4. Step 4: Simplify right side
   740,300.42x = 409,431,210,737.48
5. Step 5: Solve for x
   x = 409,431,210,737.48/740,300.42
6. Step 6: Final answer
   x = 553,060.89