Finding the Fourth Proportional to 78,274.42, 117,307.80 and 42,644.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,274.42 : 117,307.80 = 42,644.34 : x
2. Step 2: Convert to fraction form
   78,274.42/117,307.80 = 42,644.34/x
3. Step 3: Cross multiply
   78,274.42x = 117,307.80 × 42,644.34
4. Step 4: Simplify right side
   78,274.42x = 5,002,513,707.85
5. Step 5: Solve for x
   x = 5,002,513,707.85/78,274.42
6. Step 6: Final answer
   x = 63,909.94