Finding the Fourth Proportional to 139,143.12, 208,670.88 and 45,627.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,143.12 : 208,670.88 = 45,627.12 : x
2. Step 2: Convert to fraction form
   139,143.12/208,670.88 = 45,627.12/x
3. Step 3: Cross multiply
   139,143.12x = 208,670.88 × 45,627.12
4. Step 4: Simplify right side
   139,143.12x = 9,521,051,282.27
5. Step 5: Solve for x
   x = 9,521,051,282.27/139,143.12
6. Step 6: Final answer
   x = 68,426.32