Finding the Fourth Proportional to 247,155.37, 341,071.83 and 138,258.30

Step by Step Solution

1. Step 1: Write the proportion equation
   247,155.37 : 341,071.83 = 138,258.30 : x
2. Step 2: Convert to fraction form
   247,155.37/341,071.83 = 138,258.30/x
3. Step 3: Cross multiply
   247,155.37x = 341,071.83 × 138,258.30
4. Step 4: Simplify right side
   247,155.37x = 47,156,011,393.69
5. Step 5: Solve for x
   x = 47,156,011,393.69/247,155.37
6. Step 6: Final answer
   x = 190,795.01