Finding the Fourth Proportional to 99,807.84, 137,732.76 and 54,486.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,807.84 : 137,732.76 = 54,486.72 : x
2. Step 2: Convert to fraction form
   99,807.84/137,732.76 = 54,486.72/x
3. Step 3: Cross multiply
   99,807.84x = 137,732.76 × 54,486.72
4. Step 4: Simplify right side
   99,807.84x = 7,504,606,328.95
5. Step 5: Solve for x
   x = 7,504,606,328.95/99,807.84
6. Step 6: Final answer
   x = 75,190.55