Finding the Fourth Proportional to 107,100.78, 147,796.56 and 61,778.85

Step by Step Solution

1. Step 1: Write the proportion equation
   107,100.78 : 147,796.56 = 61,778.85 : x
2. Step 2: Convert to fraction form
   107,100.78/147,796.56 = 61,778.85/x
3. Step 3: Cross multiply
   107,100.78x = 147,796.56 × 61,778.85
4. Step 4: Simplify right side
   107,100.78x = 9,130,701,510.76
5. Step 5: Solve for x
   x = 9,130,701,510.76/107,100.78
6. Step 6: Final answer
   x = 85,253.36