Finding the Fourth Proportional to 99,428.84, 137,211.56 and 54,106.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99,428.84 : 137,211.56 = 54,106.82 : x
2. Step 2: Convert to fraction form
   99,428.84/137,211.56 = 54,106.82/x
3. Step 3: Cross multiply
   99,428.84x = 137,211.56 × 54,106.82
4. Step 4: Simplify right side
   99,428.84x = 7,424,080,222.25
5. Step 5: Solve for x
   x = 7,424,080,222.25/99,428.84
6. Step 6: Final answer
   x = 74,667.27