Finding the Fourth Proportional to 99,312.42, 137,053.79 and 53,993.46

Step by Step Solution

1. Step 1: Write the proportion equation
   99,312.42 : 137,053.79 = 53,993.46 : x
2. Step 2: Convert to fraction form
   99,312.42/137,053.79 = 53,993.46/x
3. Step 3: Cross multiply
   99,312.42x = 137,053.79 × 53,993.46
4. Step 4: Simplify right side
   99,312.42x = 7,400,008,003.75
5. Step 5: Solve for x
   x = 7,400,008,003.75/99,312.42
6. Step 6: Final answer
   x = 74,512.41