Finding the Fourth Proportional to 1,151,584.86, 1,588,153.59 and 721,911.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151,584.86 : 1,588,153.59 = 721,911.90 : x
2. Step 2: Convert to fraction form
   1,151,584.86/1,588,153.59 = 721,911.90/x
3. Step 3: Cross multiply
   1,151,584.86x = 1,588,153.59 × 721,911.90
4. Step 4: Simplify right side
   1,151,584.86x = 1,146,506,975,648.72
5. Step 5: Solve for x
   x = 1,146,506,975,648.72/1,151,584.86
6. Step 6: Final answer
   x = 995,590.53