Finding the Fourth Proportional to 77,381.82, 116,105.54 and 42,280.47

Step by Step Solution

1. Step 1: Write the proportion equation
   77,381.82 : 116,105.54 = 42,280.47 : x
2. Step 2: Convert to fraction form
   77,381.82/116,105.54 = 42,280.47/x
3. Step 3: Cross multiply
   77,381.82x = 116,105.54 × 42,280.47
4. Step 4: Simplify right side
   77,381.82x = 4,908,996,800.80
5. Step 5: Solve for x
   x = 4,908,996,800.80/77,381.82
6. Step 6: Final answer
   x = 63,438.63