Finding the Fourth Proportional to 99.93, 137.89 and 56.26

Step by Step Solution

1. Step 1: Write the proportion equation
   99.93 : 137.89 = 56.26 : x
2. Step 2: Convert to fraction form
   99.93/137.89 = 56.26/x
3. Step 3: Cross multiply
   99.93x = 137.89 × 56.26
4. Step 4: Simplify right side
   99.93x = 7,757.69
5. Step 5: Solve for x
   x = 7,757.69/99.93
6. Step 6: Final answer
   x = 77.63