Finding the Fourth Proportional to 1,499.86, 2,069.88 and 836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.86 : 2,069.88 = 836.72 : x
2. Step 2: Convert to fraction form
   1,499.86/2,069.88 = 836.72/x
3. Step 3: Cross multiply
   1,499.86x = 2,069.88 × 836.72
4. Step 4: Simplify right side
   1,499.86x = 1,731,899.64
5. Step 5: Solve for x
   x = 1,731,899.64/1,499.86
6. Step 6: Final answer
   x = 1,154.71