Finding the Fourth Proportional to 286,667.10, 429,409.35 and 167,978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   286,667.10 : 429,409.35 = 167,978.70 : x
2. Step 2: Convert to fraction form
   286,667.10/429,409.35 = 167,978.70/x
3. Step 3: Cross multiply
   286,667.10x = 429,409.35 × 167,978.70
4. Step 4: Simplify right side
   286,667.10x = 72,131,624,380.85
5. Step 5: Solve for x
   x = 72,131,624,380.85/286,667.10
6. Step 6: Final answer
   x = 251,621.57