Finding the Fourth Proportional to 711,112.60, 1,066,669.98 and 290,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   711,112.60 : 1,066,669.98 = 290,388.52 : x
2. Step 2: Convert to fraction form
   711,112.60/1,066,669.98 = 290,388.52/x
3. Step 3: Cross multiply
   711,112.60x = 1,066,669.98 × 290,388.52
4. Step 4: Simplify right side
   711,112.60x = 309,748,716,820.63
5. Step 5: Solve for x
   x = 309,748,716,820.63/711,112.60
6. Step 6: Final answer
   x = 435,583.22