Finding the Fourth Proportional to 516,185.55, 774,385.83 and 260,162.01

Step by Step Solution

1. Step 1: Write the proportion equation
   516,185.55 : 774,385.83 = 260,162.01 : x
2. Step 2: Convert to fraction form
   516,185.55/774,385.83 = 260,162.01/x
3. Step 3: Cross multiply
   516,185.55x = 774,385.83 × 260,162.01
4. Step 4: Simplify right side
   516,185.55x = 201,465,774,048.32
5. Step 5: Solve for x
   x = 201,465,774,048.32/516,185.55
6. Step 6: Final answer
   x = 390,297.20