Finding the Fourth Proportional to 107,111.72, 147,808.48 and 61,787

Step by Step Solution

1. Step 1: Write the proportion equation
   107,111.72 : 147,808.48 = 61,787 : x
2. Step 2: Convert to fraction form
   107,111.72/147,808.48 = 61,787/x
3. Step 3: Cross multiply
   107,111.72x = 147,808.48 × 61,787
4. Step 4: Simplify right side
   107,111.72x = 9,132,642,553.76
5. Step 5: Solve for x
   x = 9,132,642,553.76/107,111.72
6. Step 6: Final answer
   x = 85,262.78