Finding the Fourth Proportional to 99,443.63, 137,235.30 and 56,424.94

Step by Step Solution

1. Step 1: Write the proportion equation
   99,443.63 : 137,235.30 = 56,424.94 : x
2. Step 2: Convert to fraction form
   99,443.63/137,235.30 = 56,424.94/x
3. Step 3: Cross multiply
   99,443.63x = 137,235.30 × 56,424.94
4. Step 4: Simplify right side
   99,443.63x = 7,743,493,568.38
5. Step 5: Solve for x
   x = 7,743,493,568.38/99,443.63
6. Step 6: Final answer
   x = 77,868.17