Finding the Fourth Proportional to 711,131.04, 1,066,697.58 and 290,406.91

Step by Step Solution

1. Step 1: Write the proportion equation
   711,131.04 : 1,066,697.58 = 290,406.91 : x
2. Step 2: Convert to fraction form
   711,131.04/1,066,697.58 = 290,406.91/x
3. Step 3: Cross multiply
   711,131.04x = 1,066,697.58 × 290,406.91
4. Step 4: Simplify right side
   711,131.04x = 309,776,348,112.28
5. Step 5: Solve for x
   x = 309,776,348,112.28/711,131.04
6. Step 6: Final answer
   x = 435,610.78