Finding the Fourth Proportional to 105,557, 145,670.24 and 57,814.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105,557 : 145,670.24 = 57,814.80 : x
2. Step 2: Convert to fraction form
   105,557/145,670.24 = 57,814.80/x
3. Step 3: Cross multiply
   105,557x = 145,670.24 × 57,814.80
4. Step 4: Simplify right side
   105,557x = 8,421,895,791.55
5. Step 5: Solve for x
   x = 8,421,895,791.55/105,557
6. Step 6: Final answer
   x = 79,785.29