Finding the Fourth Proportional to 761,800.50, 1,051,284.69 and 422,320.50

Step by Step Solution

1. Step 1: Write the proportion equation
   761,800.50 : 1,051,284.69 = 422,320.50 : x
2. Step 2: Convert to fraction form
   761,800.50/1,051,284.69 = 422,320.50/x
3. Step 3: Cross multiply
   761,800.50x = 1,051,284.69 × 422,320.50
4. Step 4: Simplify right side
   761,800.50x = 443,979,075,923.15
5. Step 5: Solve for x
   x = 443,979,075,923.15/761,800.50
6. Step 6: Final answer
   x = 582,802.29