Finding the Fourth Proportional to 100,790.18, 139,088.31 and 55,465.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,790.18 : 139,088.31 = 55,465.82 : x
2. Step 2: Convert to fraction form
   100,790.18/139,088.31 = 55,465.82/x
3. Step 3: Cross multiply
   100,790.18x = 139,088.31 × 55,465.82
4. Step 4: Simplify right side
   100,790.18x = 7,714,647,166.56
5. Step 5: Solve for x
   x = 7,714,647,166.56/100,790.18
6. Step 6: Final answer
   x = 76,541.65