Finding the Fourth Proportional to 56,628.54, 78,147.89 and 30,787.14

Step by Step Solution

1. Step 1: Write the proportion equation
   56,628.54 : 78,147.89 = 30,787.14 : x
2. Step 2: Convert to fraction form
   56,628.54/78,147.89 = 30,787.14/x
3. Step 3: Cross multiply
   56,628.54x = 78,147.89 × 30,787.14
4. Step 4: Simplify right side
   56,628.54x = 2,405,950,030.13
5. Step 5: Solve for x
   x = 2,405,950,030.13/56,628.54
6. Step 6: Final answer
   x = 42,486.53