Finding the Fourth Proportional to 148,538.61, 222,673.05 and 54,978.75

Step by Step Solution

1. Step 1: Write the proportion equation
   148,538.61 : 222,673.05 = 54,978.75 : x
2. Step 2: Convert to fraction form
   148,538.61/222,673.05 = 54,978.75/x
3. Step 3: Cross multiply
   148,538.61x = 222,673.05 × 54,978.75
4. Step 4: Simplify right side
   148,538.61x = 12,242,285,947.69
5. Step 5: Solve for x
   x = 12,242,285,947.69/148,538.61
6. Step 6: Final answer
   x = 82,418.21