Finding the Fourth Proportional to 105,802.13, 146,006.50 and 57,404.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,802.13 : 146,006.50 = 57,404.06 : x
2. Step 2: Convert to fraction form
   105,802.13/146,006.50 = 57,404.06/x
3. Step 3: Cross multiply
   105,802.13x = 146,006.50 × 57,404.06
4. Step 4: Simplify right side
   105,802.13x = 8,381,364,869.34
5. Step 5: Solve for x
   x = 8,381,364,869.34/105,802.13
6. Step 6: Final answer
   x = 79,217.36