Finding the Fourth Proportional to 1,300,616.65, 1,951,111.91 and 402,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300,616.65 : 1,951,111.91 = 402,128.44 : x
2. Step 2: Convert to fraction form
   1,300,616.65/1,951,111.91 = 402,128.44/x
3. Step 3: Cross multiply
   1,300,616.65x = 1,951,111.91 × 402,128.44
4. Step 4: Simplify right side
   1,300,616.65x = 784,597,588,633.72
5. Step 5: Solve for x
   x = 784,597,588,633.72/1,300,616.65
6. Step 6: Final answer
   x = 603,250.46