Finding the Fourth Proportional to 100,735.63, 139,018.79 and 55,417.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100,735.63 : 139,018.79 = 55,417.10 : x
2. Step 2: Convert to fraction form
   100,735.63/139,018.79 = 55,417.10/x
3. Step 3: Cross multiply
   100,735.63x = 139,018.79 × 55,417.10
4. Step 4: Simplify right side
   100,735.63x = 7,704,017,630.76
5. Step 5: Solve for x
   x = 7,704,017,630.76/100,735.63
6. Step 6: Final answer
   x = 76,477.59