Finding the Fourth Proportional to 101,228.35, 139,696.17 and 55,907.47

Step by Step Solution

1. Step 1: Write the proportion equation
   101,228.35 : 139,696.17 = 55,907.47 : x
2. Step 2: Convert to fraction form
   101,228.35/139,696.17 = 55,907.47/x
3. Step 3: Cross multiply
   101,228.35x = 139,696.17 × 55,907.47
4. Step 4: Simplify right side
   101,228.35x = 7,810,059,433.39
5. Step 5: Solve for x
   x = 7,810,059,433.39/101,228.35
6. Step 6: Final answer
   x = 77,152.89