Finding the Fourth Proportional to 104,887.84, 144,748.56 and 57,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   104,887.84 : 144,748.56 = 57,142.72 : x
2. Step 2: Convert to fraction form
   104,887.84/144,748.56 = 57,142.72/x
3. Step 3: Cross multiply
   104,887.84x = 144,748.56 × 57,142.72
4. Step 4: Simplify right side
   104,887.84x = 8,271,326,434.48
5. Step 5: Solve for x
   x = 8,271,326,434.48/104,887.84
6. Step 6: Final answer
   x = 78,858.77