Finding the Fourth Proportional to 1,155,906.44, 1,595,111.69 and 639,682.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155,906.44 : 1,595,111.69 = 639,682.12 : x
2. Step 2: Convert to fraction form
   1,155,906.44/1,595,111.69 = 639,682.12/x
3. Step 3: Cross multiply
   1,155,906.44x = 1,595,111.69 × 639,682.12
4. Step 4: Simplify right side
   1,155,906.44x = 1,020,364,429,733.99
5. Step 5: Solve for x
   x = 1,020,364,429,733.99/1,155,906.44
6. Step 6: Final answer
   x = 882,739.63