Finding the Fourth Proportional to 99,976.31, 137,970.63 and 54,653.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,976.31 : 137,970.63 = 54,653.30 : x
2. Step 2: Convert to fraction form
   99,976.31/137,970.63 = 54,653.30/x
3. Step 3: Cross multiply
   99,976.31x = 137,970.63 × 54,653.30
4. Step 4: Simplify right side
   99,976.31x = 7,540,549,542.73
5. Step 5: Solve for x
   x = 7,540,549,542.73/99,976.31
6. Step 6: Final answer
   x = 75,423.37