Finding the Fourth Proportional to 539,566.72, 744,486.56 and 313,090.72

Step by Step Solution

1. Step 1: Write the proportion equation
   539,566.72 : 744,486.56 = 313,090.72 : x
2. Step 2: Convert to fraction form
   539,566.72/744,486.56 = 313,090.72/x
3. Step 3: Cross multiply
   539,566.72x = 744,486.56 × 313,090.72
4. Step 4: Simplify right side
   539,566.72x = 233,091,833,100.72
5. Step 5: Solve for x
   x = 233,091,833,100.72/539,566.72
6. Step 6: Final answer
   x = 431,998.17