Finding the Fourth Proportional to 209,178.08, 288,667.98 and 113,684.78

Step by Step Solution

1. Step 1: Write the proportion equation
   209,178.08 : 288,667.98 = 113,684.78 : x
2. Step 2: Convert to fraction form
   209,178.08/288,667.98 = 113,684.78/x
3. Step 3: Cross multiply
   209,178.08x = 288,667.98 × 113,684.78
4. Step 4: Simplify right side
   209,178.08x = 32,817,155,799.34
5. Step 5: Solve for x
   x = 32,817,155,799.34/209,178.08
6. Step 6: Final answer
   x = 156,886.21