Finding the Fourth Proportional to 52,910.39, 79,364.72 and 21,319.69

Step by Step Solution

1. Step 1: Write the proportion equation
   52,910.39 : 79,364.72 = 21,319.69 : x
2. Step 2: Convert to fraction form
   52,910.39/79,364.72 = 21,319.69/x
3. Step 3: Cross multiply
   52,910.39x = 79,364.72 × 21,319.69
4. Step 4: Simplify right side
   52,910.39x = 1,692,031,227.34
5. Step 5: Solve for x
   x = 1,692,031,227.34/52,910.39
6. Step 6: Final answer
   x = 31,979.19