Finding the Fourth Proportional to 99,320.31, 137,016.50 and 59,011.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,320.31 : 137,016.50 = 59,011.47 : x
2. Step 2: Convert to fraction form
   99,320.31/137,016.50 = 59,011.47/x
3. Step 3: Cross multiply
   99,320.31x = 137,016.50 × 59,011.47
4. Step 4: Simplify right side
   99,320.31x = 8,085,544,784.20
5. Step 5: Solve for x
   x = 8,085,544,784.20/99,320.31
6. Step 6: Final answer
   x = 81,408.78