Finding the Fourth Proportional to 520,086.25, 780,336.33 and 200,152.23

Step by Step Solution

1. Step 1: Write the proportion equation
   520,086.25 : 780,336.33 = 200,152.23 : x
2. Step 2: Convert to fraction form
   520,086.25/780,336.33 = 200,152.23/x
3. Step 3: Cross multiply
   520,086.25x = 780,336.33 × 200,152.23
4. Step 4: Simplify right side
   520,086.25x = 156,186,056,599.52
5. Step 5: Solve for x
   x = 156,186,056,599.52/520,086.25
6. Step 6: Final answer
   x = 300,307.99