Finding the Fourth Proportional to 1,870,128.16, 2,579,580.12 and 1,296,959.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870,128.16 : 2,579,580.12 = 1,296,959.20 : x
2. Step 2: Convert to fraction form
   1,870,128.16/2,579,580.12 = 1,296,959.20/x
3. Step 3: Cross multiply
   1,870,128.16x = 2,579,580.12 × 1,296,959.20
4. Step 4: Simplify right side
   1,870,128.16x = 3,345,610,155,873.20
5. Step 5: Solve for x
   x = 3,345,610,155,873.20/1,870,128.16
6. Step 6: Final answer
   x = 1,788,973.74