Finding the Fourth Proportional to 107,112.72, 147,809.86 and 61,788

Step by Step Solution

1. Step 1: Write the proportion equation
   107,112.72 : 147,809.86 = 61,788 : x
2. Step 2: Convert to fraction form
   107,112.72/147,809.86 = 61,788/x
3. Step 3: Cross multiply
   107,112.72x = 147,809.86 × 61,788
4. Step 4: Simplify right side
   107,112.72x = 9,132,875,629.68
5. Step 5: Solve for x
   x = 9,132,875,629.68/107,112.72
6. Step 6: Final answer
   x = 85,264.16