Finding the Fourth Proportional to 99,776.54, 137,673.50 and 58,947.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,776.54 : 137,673.50 = 58,947.32 : x
2. Step 2: Convert to fraction form
   99,776.54/137,673.50 = 58,947.32/x
3. Step 3: Cross multiply
   99,776.54x = 137,673.50 × 58,947.32
4. Step 4: Simplify right side
   99,776.54x = 8,115,483,860.02
5. Step 5: Solve for x
   x = 8,115,483,860.02/99,776.54
6. Step 6: Final answer
   x = 81,336.59