Finding the Fourth Proportional to 99,834.55, 137,768.05 and 54,511.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,834.55 : 137,768.05 = 54,511.72 : x
2. Step 2: Convert to fraction form
   99,834.55/137,768.05 = 54,511.72/x
3. Step 3: Cross multiply
   99,834.55x = 137,768.05 × 54,511.72
4. Step 4: Simplify right side
   99,834.55x = 7,509,973,366.55
5. Step 5: Solve for x
   x = 7,509,973,366.55/99,834.55
6. Step 6: Final answer
   x = 75,224.19