Finding the Fourth Proportional to 99,870.14, 137,823.77 and 54,548.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,870.14 : 137,823.77 = 54,548.88 : x
2. Step 2: Convert to fraction form
   99,870.14/137,823.77 = 54,548.88/x
3. Step 3: Cross multiply
   99,870.14x = 137,823.77 × 54,548.88
4. Step 4: Simplify right side
   99,870.14x = 7,518,132,290.88
5. Step 5: Solve for x
   x = 7,518,132,290.88/99,870.14
6. Step 6: Final answer
   x = 75,279.08