Finding the Fourth Proportional to 139,316.82, 208,975.26 and 56,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,316.82 : 208,975.26 = 56,152.50 : x
2. Step 2: Convert to fraction form
   139,316.82/208,975.26 = 56,152.50/x
3. Step 3: Cross multiply
   139,316.82x = 208,975.26 × 56,152.50
4. Step 4: Simplify right side
   139,316.82x = 11,734,483,287.15
5. Step 5: Solve for x
   x = 11,734,483,287.15/139,316.82
6. Step 6: Final answer
   x = 84,228.76