Finding the Fourth Proportional to 711,109.68, 1,066,665.48 and 290,385.52

Step by Step Solution

1. Step 1: Write the proportion equation
   711,109.68 : 1,066,665.48 = 290,385.52 : x
2. Step 2: Convert to fraction form
   711,109.68/1,066,665.48 = 290,385.52/x
3. Step 3: Cross multiply
   711,109.68x = 1,066,665.48 × 290,385.52
4. Step 4: Simplify right side
   711,109.68x = 309,744,210,075.85
5. Step 5: Solve for x
   x = 309,744,210,075.85/711,109.68
6. Step 6: Final answer
   x = 435,578.67