Finding the Fourth Proportional to 318,667.74, 477,780.15 and 141,077.88

Step by Step Solution

1. Step 1: Write the proportion equation
   318,667.74 : 477,780.15 = 141,077.88 : x
2. Step 2: Convert to fraction form
   318,667.74/477,780.15 = 141,077.88/x
3. Step 3: Cross multiply
   318,667.74x = 477,780.15 × 141,077.88
4. Step 4: Simplify right side
   318,667.74x = 67,404,210,668.08
5. Step 5: Solve for x
   x = 67,404,210,668.08/318,667.74
6. Step 6: Final answer
   x = 211,518.78