Finding the Fourth Proportional to 993,128.38, 1,488,659.18 and 460,211.15

Step by Step Solution

1. Step 1: Write the proportion equation
   993,128.38 : 1,488,659.18 = 460,211.15 : x
2. Step 2: Convert to fraction form
   993,128.38/1,488,659.18 = 460,211.15/x
3. Step 3: Cross multiply
   993,128.38x = 1,488,659.18 × 460,211.15
4. Step 4: Simplify right side
   993,128.38x = 685,097,554,606.45
5. Step 5: Solve for x
   x = 685,097,554,606.45/993,128.38
6. Step 6: Final answer
   x = 689,837.86