Finding the Fourth Proportional to 99,613.03, 137,461.93 and 54,290.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,613.03 : 137,461.93 = 54,290.05 : x
2. Step 2: Convert to fraction form
   99,613.03/137,461.93 = 54,290.05/x
3. Step 3: Cross multiply
   99,613.03x = 137,461.93 × 54,290.05
4. Step 4: Simplify right side
   99,613.03x = 7,462,815,052.80
5. Step 5: Solve for x
   x = 7,462,815,052.80/99,613.03
6. Step 6: Final answer
   x = 74,918.06