Finding the Fourth Proportional to 99,886.42, 137,837.98 and 54,563.76

Step by Step Solution

1. Step 1: Write the proportion equation
   99,886.42 : 137,837.98 = 54,563.76 : x
2. Step 2: Convert to fraction form
   99,886.42/137,837.98 = 54,563.76/x
3. Step 3: Cross multiply
   99,886.42x = 137,837.98 × 54,563.76
4. Step 4: Simplify right side
   99,886.42x = 7,520,958,459.60
5. Step 5: Solve for x
   x = 7,520,958,459.60/99,886.42
6. Step 6: Final answer
   x = 75,295.10