Finding the Fourth Proportional to 91,815, 137,780.76 and 39,224.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,815 : 137,780.76 = 39,224.88 : x
2. Step 2: Convert to fraction form
   91,815/137,780.76 = 39,224.88/x
3. Step 3: Cross multiply
   91,815x = 137,780.76 × 39,224.88
4. Step 4: Simplify right side
   91,815x = 5,404,433,777.31
5. Step 5: Solve for x
   x = 5,404,433,777.31/91,815
6. Step 6: Final answer
   x = 58,862.21