Finding the Fourth Proportional to 209,978.34, 314,967.74 and 52,206.81

Step by Step Solution

1. Step 1: Write the proportion equation
   209,978.34 : 314,967.74 = 52,206.81 : x
2. Step 2: Convert to fraction form
   209,978.34/314,967.74 = 52,206.81/x
3. Step 3: Cross multiply
   209,978.34x = 314,967.74 × 52,206.81
4. Step 4: Simplify right side
   209,978.34x = 16,443,460,958.31
5. Step 5: Solve for x
   x = 16,443,460,958.31/209,978.34
6. Step 6: Final answer
   x = 78,310.27