Finding the Fourth Proportional to 99,518.58, 137,510.51 and 79,540.33

Step by Step Solution

1. Step 1: Write the proportion equation
   99,518.58 : 137,510.51 = 79,540.33 : x
2. Step 2: Convert to fraction form
   99,518.58/137,510.51 = 79,540.33/x
3. Step 3: Cross multiply
   99,518.58x = 137,510.51 × 79,540.33
4. Step 4: Simplify right side
   99,518.58x = 10,937,631,343.87
5. Step 5: Solve for x
   x = 10,937,631,343.87/99,518.58
6. Step 6: Final answer
   x = 109,905.42