Finding the Fourth Proportional to 105,166.02, 145,132.50 and 57,423

Step by Step Solution

1. Step 1: Write the proportion equation
   105,166.02 : 145,132.50 = 57,423 : x
2. Step 2: Convert to fraction form
   105,166.02/145,132.50 = 57,423/x
3. Step 3: Cross multiply
   105,166.02x = 145,132.50 × 57,423
4. Step 4: Simplify right side
   105,166.02x = 8,333,943,547.50
5. Step 5: Solve for x
   x = 8,333,943,547.50/105,166.02
6. Step 6: Final answer
   x = 79,245.59