Finding the Fourth Proportional to 99,870.45, 137,820.52 and 54,548.45

Step by Step Solution

1. Step 1: Write the proportion equation
   99,870.45 : 137,820.52 = 54,548.45 : x
2. Step 2: Convert to fraction form
   99,870.45/137,820.52 = 54,548.45/x
3. Step 3: Cross multiply
   99,870.45x = 137,820.52 × 54,548.45
4. Step 4: Simplify right side
   99,870.45x = 7,517,895,744.19
5. Step 5: Solve for x
   x = 7,517,895,744.19/99,870.45
6. Step 6: Final answer
   x = 75,276.48