Finding the Fourth Proportional to 355,606.78, 532,764.18 and 205,530.10

Step by Step Solution

1. Step 1: Write the proportion equation
   355,606.78 : 532,764.18 = 205,530.10 : x
2. Step 2: Convert to fraction form
   355,606.78/532,764.18 = 205,530.10/x
3. Step 3: Cross multiply
   355,606.78x = 532,764.18 × 205,530.10
4. Step 4: Simplify right side
   355,606.78x = 109,499,075,191.82
5. Step 5: Solve for x
   x = 109,499,075,191.82/355,606.78
6. Step 6: Final answer
   x = 307,921.79