Finding the Fourth Proportional to 78,107.31, 117,109.94 and 33,142.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,107.31 : 117,109.94 = 33,142.59 : x
2. Step 2: Convert to fraction form
   78,107.31/117,109.94 = 33,142.59/x
3. Step 3: Cross multiply
   78,107.31x = 117,109.94 × 33,142.59
4. Step 4: Simplify right side
   78,107.31x = 3,881,326,560.63
5. Step 5: Solve for x
   x = 3,881,326,560.63/78,107.31
6. Step 6: Final answer
   x = 49,692.23