Finding the Fourth Proportional to 289,025,404.24, 398,855,449.76 and 156,866,404.88

Step by Step Solution

1. Step 1: Write the proportion equation
   289,025,404.24 : 398,855,449.76 = 156,866,404.88 : x
2. Step 2: Convert to fraction form
   289,025,404.24/398,855,449.76 = 156,866,404.88/x
3. Step 3: Cross multiply
   289,025,404.24x = 398,855,449.76 × 156,866,404.88
4. Step 4: Simplify right side
   289,025,404.24x = 62,567,020,470,646,656
5. Step 5: Solve for x
   x = 62,567,020,470,646,656/289,025,404.24
6. Step 6: Final answer
   x = 216,475,851.44