Finding the Fourth Proportional to 77,315.31, 115,987.55 and 30,571.83

Step by Step Solution

1. Step 1: Write the proportion equation
   77,315.31 : 115,987.55 = 30,571.83 : x
2. Step 2: Convert to fraction form
   77,315.31/115,987.55 = 30,571.83/x
3. Step 3: Cross multiply
   77,315.31x = 115,987.55 × 30,571.83
4. Step 4: Simplify right side
   77,315.31x = 3,545,951,507.86
5. Step 5: Solve for x
   x = 3,545,951,507.86/77,315.31
6. Step 6: Final answer
   x = 45,863.51