Finding the Fourth Proportional to 2,405.32, 3,607.86 and 761.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.32 : 3,607.86 = 761.86 : x
2. Step 2: Convert to fraction form
   2,405.32/3,607.86 = 761.86/x
3. Step 3: Cross multiply
   2,405.32x = 3,607.86 × 761.86
4. Step 4: Simplify right side
   2,405.32x = 2,748,684.22
5. Step 5: Solve for x
   x = 2,748,684.22/2,405.32
6. Step 6: Final answer
   x = 1,142.75