Finding the Fourth Proportional to 99,667.50, 137,574.47 and 59,393.90

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.50 : 137,574.47 = 59,393.90 : x
2. Step 2: Convert to fraction form
   99,667.50/137,574.47 = 59,393.90/x
3. Step 3: Cross multiply
   99,667.50x = 137,574.47 × 59,393.90
4. Step 4: Simplify right side
   99,667.50x = 8,171,083,328.89
5. Step 5: Solve for x
   x = 8,171,083,328.89/99,667.50
6. Step 6: Final answer
   x = 81,983.43