Finding the Fourth Proportional to 76,785.42, 105,923.34 and 52,870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,785.42 : 105,923.34 = 52,870.56 : x
2. Step 2: Convert to fraction form
   76,785.42/105,923.34 = 52,870.56/x
3. Step 3: Cross multiply
   76,785.42x = 105,923.34 × 52,870.56
4. Step 4: Simplify right side
   76,785.42x = 5,600,226,302.87
5. Step 5: Solve for x
   x = 5,600,226,302.87/76,785.42
6. Step 6: Final answer
   x = 72,933.46