Finding the Fourth Proportional to 139,807.84, 209,801.94 and 51,053.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,807.84 : 209,801.94 = 51,053.92 : x
2. Step 2: Convert to fraction form
   139,807.84/209,801.94 = 51,053.92/x
3. Step 3: Cross multiply
   139,807.84x = 209,801.94 × 51,053.92
4. Step 4: Simplify right side
   139,807.84x = 10,711,211,460.60
5. Step 5: Solve for x
   x = 10,711,211,460.60/139,807.84
6. Step 6: Final answer
   x = 76,613.81