Finding the Fourth Proportional to 105,300.02, 145,314.14 and 57,553.40

Step by Step Solution

1. Step 1: Write the proportion equation
   105,300.02 : 145,314.14 = 57,553.40 : x
2. Step 2: Convert to fraction form
   105,300.02/145,314.14 = 57,553.40/x
3. Step 3: Cross multiply
   105,300.02x = 145,314.14 × 57,553.40
4. Step 4: Simplify right side
   105,300.02x = 8,363,321,810.74
5. Step 5: Solve for x
   x = 8,363,321,810.74/105,300.02
6. Step 6: Final answer
   x = 79,423.75