Finding the Fourth Proportional to 99,471, 137,269.98 and 57,043.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,471 : 137,269.98 = 57,043.56 : x
2. Step 2: Convert to fraction form
   99,471/137,269.98 = 57,043.56/x
3. Step 3: Cross multiply
   99,471x = 137,269.98 × 57,043.56
4. Step 4: Simplify right side
   99,471x = 7,830,368,340.33
5. Step 5: Solve for x
   x = 7,830,368,340.33/99,471
6. Step 6: Final answer
   x = 78,720.11