Finding the Fourth Proportional to 686,012.10, 1,030,184.55 and 508,719.30

Step by Step Solution

1. Step 1: Write the proportion equation
   686,012.10 : 1,030,184.55 = 508,719.30 : x
2. Step 2: Convert to fraction form
   686,012.10/1,030,184.55 = 508,719.30/x
3. Step 3: Cross multiply
   686,012.10x = 1,030,184.55 × 508,719.30
4. Step 4: Simplify right side
   686,012.10x = 524,074,763,146.82
5. Step 5: Solve for x
   x = 524,074,763,146.82/686,012.10
6. Step 6: Final answer
   x = 763,943.91