Finding the Fourth Proportional to 105,557.27, 145,670.27 and 57,812.63

Step by Step Solution

1. Step 1: Write the proportion equation
   105,557.27 : 145,670.27 = 57,812.63 : x
2. Step 2: Convert to fraction form
   105,557.27/145,670.27 = 57,812.63/x
3. Step 3: Cross multiply
   105,557.27x = 145,670.27 × 57,812.63
4. Step 4: Simplify right side
   105,557.27x = 8,421,580,404.10
5. Step 5: Solve for x
   x = 8,421,580,404.10/105,557.27
6. Step 6: Final answer
   x = 79,782.10