Finding the Fourth Proportional to 99,632.72, 137,501.40 and 57,199.44

Step by Step Solution

1. Step 1: Write the proportion equation
   99,632.72 : 137,501.40 = 57,199.44 : x
2. Step 2: Convert to fraction form
   99,632.72/137,501.40 = 57,199.44/x
3. Step 3: Cross multiply
   99,632.72x = 137,501.40 × 57,199.44
4. Step 4: Simplify right side
   99,632.72x = 7,865,003,079.22
5. Step 5: Solve for x
   x = 7,865,003,079.22/99,632.72
6. Step 6: Final answer
   x = 78,939.96