Finding the Fourth Proportional to 711,131.07, 1,066,697.63 and 290,406.94

Step by Step Solution

1. Step 1: Write the proportion equation
   711,131.07 : 1,066,697.63 = 290,406.94 : x
2. Step 2: Convert to fraction form
   711,131.07/1,066,697.63 = 290,406.94/x
3. Step 3: Cross multiply
   711,131.07x = 1,066,697.63 × 290,406.94
4. Step 4: Simplify right side
   711,131.07x = 309,776,394,633.55
5. Step 5: Solve for x
   x = 309,776,394,633.55/711,131.07
6. Step 6: Final answer
   x = 435,610.83