Finding the Fourth Proportional to 105,654.15, 145,802.06 and 57,910.47

Step by Step Solution

1. Step 1: Write the proportion equation
   105,654.15 : 145,802.06 = 57,910.47 : x
2. Step 2: Convert to fraction form
   105,654.15/145,802.06 = 57,910.47/x
3. Step 3: Cross multiply
   105,654.15x = 145,802.06 × 57,910.47
4. Step 4: Simplify right side
   105,654.15x = 8,443,465,532.02
5. Step 5: Solve for x
   x = 8,443,465,532.02/105,654.15
6. Step 6: Final answer
   x = 79,916.08