Finding the Fourth Proportional to 2,307.63, 3,184.61 and 1,312.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,307.63 : 3,184.61 = 1,312.88 : x
2. Step 2: Convert to fraction form
   2,307.63/3,184.61 = 1,312.88/x
3. Step 3: Cross multiply
   2,307.63x = 3,184.61 × 1,312.88
4. Step 4: Simplify right side
   2,307.63x = 4,181,012.17
5. Step 5: Solve for x
   x = 4,181,012.17/2,307.63
6. Step 6: Final answer
   x = 1,811.82