Finding the Fourth Proportional to 78,783.74, 108,719.72 and 42,974.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,783.74 : 108,719.72 = 42,974.04 : x
2. Step 2: Convert to fraction form
   78,783.74/108,719.72 = 42,974.04/x
3. Step 3: Cross multiply
   78,783.74x = 108,719.72 × 42,974.04
4. Step 4: Simplify right side
   78,783.74x = 4,672,125,950.05
5. Step 5: Solve for x
   x = 4,672,125,950.05/78,783.74
6. Step 6: Final answer
   x = 59,303.18