Finding the Fourth Proportional to 521,667.42, 782,504.01 and 147,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   521,667.42 : 782,504.01 = 147,690.78 : x
2. Step 2: Convert to fraction form
   521,667.42/782,504.01 = 147,690.78/x
3. Step 3: Cross multiply
   521,667.42x = 782,504.01 × 147,690.78
4. Step 4: Simplify right side
   521,667.42x = 115,568,627,590.03
5. Step 5: Solve for x
   x = 115,568,627,590.03/521,667.42
6. Step 6: Final answer
   x = 221,536.99