Finding the Fourth Proportional to 107,021.59, 147,689.42 and 61,699.37

Step by Step Solution

1. Step 1: Write the proportion equation
   107,021.59 : 147,689.42 = 61,699.37 : x
2. Step 2: Convert to fraction form
   107,021.59/147,689.42 = 61,699.37/x
3. Step 3: Cross multiply
   107,021.59x = 147,689.42 × 61,699.37
4. Step 4: Simplify right side
   107,021.59x = 9,112,343,122.72
5. Step 5: Solve for x
   x = 9,112,343,122.72/107,021.59
6. Step 6: Final answer
   x = 85,144.91