Finding the Fourth Proportional to 42,773, 64,116.84 and 20,580.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,773 : 64,116.84 = 20,580.08 : x
2. Step 2: Convert to fraction form
   42,773/64,116.84 = 20,580.08/x
3. Step 3: Cross multiply
   42,773x = 64,116.84 × 20,580.08
4. Step 4: Simplify right side
   42,773x = 1,319,529,696.55
5. Step 5: Solve for x
   x = 1,319,529,696.55/42,773
6. Step 6: Final answer
   x = 30,849.59