Finding the Fourth Proportional to 99,819.81, 137,749.52 and 56,798.37

Step by Step Solution

1. Step 1: Write the proportion equation
   99,819.81 : 137,749.52 = 56,798.37 : x
2. Step 2: Convert to fraction form
   99,819.81/137,749.52 = 56,798.37/x
3. Step 3: Cross multiply
   99,819.81x = 137,749.52 × 56,798.37
4. Step 4: Simplify right side
   99,819.81x = 7,823,947,920.29
5. Step 5: Solve for x
   x = 7,823,947,920.29/99,819.81
6. Step 6: Final answer
   x = 78,380.71