Finding the Fourth Proportional to 105,493.04, 145,583.88 and 57,746.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,493.04 : 145,583.88 = 57,746.72 : x
2. Step 2: Convert to fraction form
   105,493.04/145,583.88 = 57,746.72/x
3. Step 3: Cross multiply
   105,493.04x = 145,583.88 × 57,746.72
4. Step 4: Simplify right side
   105,493.04x = 8,406,991,554.87
5. Step 5: Solve for x
   x = 8,406,991,554.87/105,493.04
6. Step 6: Final answer
   x = 79,692.38