Finding the Fourth Proportional to 520,333.83, 780,145.59 and 277,211.25

Step by Step Solution

1. Step 1: Write the proportion equation
   520,333.83 : 780,145.59 = 277,211.25 : x
2. Step 2: Convert to fraction form
   520,333.83/780,145.59 = 277,211.25/x
3. Step 3: Cross multiply
   520,333.83x = 780,145.59 × 277,211.25
4. Step 4: Simplify right side
   520,333.83x = 216,265,134,185.89
5. Step 5: Solve for x
   x = 216,265,134,185.89/520,333.83
6. Step 6: Final answer
   x = 415,627.66