Finding the Fourth Proportional to 520,066.10, 780,185.55 and 204,533.30

Step by Step Solution

1. Step 1: Write the proportion equation
   520,066.10 : 780,185.55 = 204,533.30 : x
2. Step 2: Convert to fraction form
   520,066.10/780,185.55 = 204,533.30/x
3. Step 3: Cross multiply
   520,066.10x = 780,185.55 × 204,533.30
4. Step 4: Simplify right side
   520,066.10x = 159,573,925,153.82
5. Step 5: Solve for x
   x = 159,573,925,153.82/520,066.10
6. Step 6: Final answer
   x = 306,833.93