Finding the Fourth Proportional to 139,077.18, 208,523.61 and 50,319

Step by Step Solution

1. Step 1: Write the proportion equation
   139,077.18 : 208,523.61 = 50,319 : x
2. Step 2: Convert to fraction form
   139,077.18/208,523.61 = 50,319/x
3. Step 3: Cross multiply
   139,077.18x = 208,523.61 × 50,319
4. Step 4: Simplify right side
   139,077.18x = 10,492,699,531.59
5. Step 5: Solve for x
   x = 10,492,699,531.59/139,077.18
6. Step 6: Final answer
   x = 75,445.16