Finding the Fourth Proportional to 105,787, 145,986.06 and 61,075

Step by Step Solution

1. Step 1: Write the proportion equation
   105,787 : 145,986.06 = 61,075 : x
2. Step 2: Convert to fraction form
   105,787/145,986.06 = 61,075/x
3. Step 3: Cross multiply
   105,787x = 145,986.06 × 61,075
4. Step 4: Simplify right side
   105,787x = 8,916,098,614.50
5. Step 5: Solve for x
   x = 8,916,098,614.50/105,787
6. Step 6: Final answer
   x = 84,283.50