Finding the Fourth Proportional to 2,545.42, 3,818.59 and 1,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,545.42 : 3,818.59 = 1,312.50 : x
2. Step 2: Convert to fraction form
   2,545.42/3,818.59 = 1,312.50/x
3. Step 3: Cross multiply
   2,545.42x = 3,818.59 × 1,312.50
4. Step 4: Simplify right side
   2,545.42x = 5,011,899.38
5. Step 5: Solve for x
   x = 5,011,899.38/2,545.42
6. Step 6: Final answer
   x = 1,968.99