Finding the Fourth Proportional to 765,926.32, 1,056,978.31 and 421,761.42

Step by Step Solution

1. Step 1: Write the proportion equation
   765,926.32 : 1,056,978.31 = 421,761.42 : x
2. Step 2: Convert to fraction form
   765,926.32/1,056,978.31 = 421,761.42/x
3. Step 3: Cross multiply
   765,926.32x = 1,056,978.31 × 421,761.42
4. Step 4: Simplify right side
   765,926.32x = 445,792,678,500.90
5. Step 5: Solve for x
   x = 445,792,678,500.90/765,926.32
6. Step 6: Final answer
   x = 582,030.76