Finding the Fourth Proportional to 78,958.72, 108,931.84 and 45,406.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,958.72 : 108,931.84 = 45,406.72 : x
2. Step 2: Convert to fraction form
   78,958.72/108,931.84 = 45,406.72/x
3. Step 3: Cross multiply
   78,958.72x = 108,931.84 × 45,406.72
4. Step 4: Simplify right side
   78,958.72x = 4,946,237,557.96
5. Step 5: Solve for x
   x = 4,946,237,557.96/78,958.72
6. Step 6: Final answer
   x = 62,643.34