Finding the Fourth Proportional to 77,390.58, 116,085.89 and 51,089.18

Step by Step Solution

1. Step 1: Write the proportion equation
   77,390.58 : 116,085.89 = 51,089.18 : x
2. Step 2: Convert to fraction form
   77,390.58/116,085.89 = 51,089.18/x
3. Step 3: Cross multiply
   77,390.58x = 116,085.89 × 51,089.18
4. Step 4: Simplify right side
   77,390.58x = 5,930,732,093.79
5. Step 5: Solve for x
   x = 5,930,732,093.79/77,390.58
6. Step 6: Final answer
   x = 76,633.77