Finding the Fourth Proportional to 1,068,112.72, 1,602,431.16 and 320,158

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068,112.72 : 1,602,431.16 = 320,158 : x
2. Step 2: Convert to fraction form
   1,068,112.72/1,602,431.16 = 320,158/x
3. Step 3: Cross multiply
   1,068,112.72x = 1,602,431.16 × 320,158
4. Step 4: Simplify right side
   1,068,112.72x = 513,031,155,323.28
5. Step 5: Solve for x
   x = 513,031,155,323.28/1,068,112.72
6. Step 6: Final answer
   x = 480,315.56