Finding the Fourth Proportional to 78,271.42, 117,303.30 and 42,641.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,271.42 : 117,303.30 = 42,641.34 : x
2. Step 2: Convert to fraction form
   78,271.42/117,303.30 = 42,641.34/x
3. Step 3: Cross multiply
   78,271.42x = 117,303.30 × 42,641.34
4. Step 4: Simplify right side
   78,271.42x = 5,001,969,898.42
5. Step 5: Solve for x
   x = 5,001,969,898.42/78,271.42
6. Step 6: Final answer
   x = 63,905.44