Finding the Fourth Proportional to 99,317.87, 137,061.30 and 53,998.91

Step by Step Solution

1. Step 1: Write the proportion equation
   99,317.87 : 137,061.30 = 53,998.91 : x
2. Step 2: Convert to fraction form
   99,317.87/137,061.30 = 53,998.91/x
3. Step 3: Cross multiply
   99,317.87x = 137,061.30 × 53,998.91
4. Step 4: Simplify right side
   99,317.87x = 7,401,160,117.88
5. Step 5: Solve for x
   x = 7,401,160,117.88/99,317.87
6. Step 6: Final answer
   x = 74,519.93