Finding the Fourth Proportional to 124,435.87, 186,840.72 and 71,187.95

Step by Step Solution

1. Step 1: Write the proportion equation
   124,435.87 : 186,840.72 = 71,187.95 : x
2. Step 2: Convert to fraction form
   124,435.87/186,840.72 = 71,187.95/x
3. Step 3: Cross multiply
   124,435.87x = 186,840.72 × 71,187.95
4. Step 4: Simplify right side
   124,435.87x = 13,300,808,300.43
5. Step 5: Solve for x
   x = 13,300,808,300.43/124,435.87
6. Step 6: Final answer
   x = 106,888.86