Finding the Fourth Proportional to 100,410.99, 138,562.56 and 55,087.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,410.99 : 138,562.56 = 55,087.98 : x
2. Step 2: Convert to fraction form
   100,410.99/138,562.56 = 55,087.98/x
3. Step 3: Cross multiply
   100,410.99x = 138,562.56 × 55,087.98
4. Step 4: Simplify right side
   100,410.99x = 7,633,131,534.03
5. Step 5: Solve for x
   x = 7,633,131,534.03/100,410.99
6. Step 6: Final answer
   x = 76,018.89