Finding the Fourth Proportional to 870,111.91, 1,200,736.33 and 482,904.87

Step by Step Solution

1. Step 1: Write the proportion equation
   870,111.91 : 1,200,736.33 = 482,904.87 : x
2. Step 2: Convert to fraction form
   870,111.91/1,200,736.33 = 482,904.87/x
3. Step 3: Cross multiply
   870,111.91x = 1,200,736.33 × 482,904.87
4. Step 4: Simplify right side
   870,111.91x = 579,841,421,342.93
5. Step 5: Solve for x
   x = 579,841,421,342.93/870,111.91
6. Step 6: Final answer
   x = 666,398.67