Finding the Fourth Proportional to 99,830.79, 149,753.37 and 31,436.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,830.79 : 149,753.37 = 31,436.48 : x
2. Step 2: Convert to fraction form
   99,830.79/149,753.37 = 31,436.48/x
3. Step 3: Cross multiply
   99,830.79x = 149,753.37 × 31,436.48
4. Step 4: Simplify right side
   99,830.79x = 4,707,718,072.17
5. Step 5: Solve for x
   x = 4,707,718,072.17/99,830.79
6. Step 6: Final answer
   x = 47,156.98