Finding the Fourth Proportional to 100,646.98, 138,895.98 and 55,328.46

Step by Step Solution

1. Step 1: Write the proportion equation
   100,646.98 : 138,895.98 = 55,328.46 : x
2. Step 2: Convert to fraction form
   100,646.98/138,895.98 = 55,328.46/x
3. Step 3: Cross multiply
   100,646.98x = 138,895.98 × 55,328.46
4. Step 4: Simplify right side
   100,646.98x = 7,684,900,673.59
5. Step 5: Solve for x
   x = 7,684,900,673.59/100,646.98
6. Step 6: Final answer
   x = 76,355.01