Finding the Fourth Proportional to 99,787.12, 137,706.04 and 55,075.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,787.12 : 137,706.04 = 55,075.12 : x
2. Step 2: Convert to fraction form
   99,787.12/137,706.04 = 55,075.12/x
3. Step 3: Cross multiply
   99,787.12x = 137,706.04 × 55,075.12
4. Step 4: Simplify right side
   99,787.12x = 7,584,176,677.72
5. Step 5: Solve for x
   x = 7,584,176,677.72/99,787.12
6. Step 6: Final answer
   x = 76,003.56