Finding the Fourth Proportional to 139,312.59, 208,876.01 and 50,554.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,312.59 : 208,876.01 = 50,554.55 : x
2. Step 2: Convert to fraction form
   139,312.59/208,876.01 = 50,554.55/x
3. Step 3: Cross multiply
   139,312.59x = 208,876.01 × 50,554.55
4. Step 4: Simplify right side
   139,312.59x = 10,559,631,394.19
5. Step 5: Solve for x
   x = 10,559,631,394.19/139,312.59
6. Step 6: Final answer
   x = 75,798.11