Finding the Fourth Proportional to 99,619.30, 137,649.63 and 79,641.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,619.30 : 137,649.63 = 79,641.10 : x
2. Step 2: Convert to fraction form
   99,619.30/137,649.63 = 79,641.10/x
3. Step 3: Cross multiply
   99,619.30x = 137,649.63 × 79,641.10
4. Step 4: Simplify right side
   99,619.30x = 10,962,567,947.79
5. Step 5: Solve for x
   x = 10,962,567,947.79/99,619.30
6. Step 6: Final answer
   x = 110,044.62