Finding the Fourth Proportional to 107,123.78, 147,828.30 and 61,801.86

Step by Step Solution

1. Step 1: Write the proportion equation
   107,123.78 : 147,828.30 = 61,801.86 : x
2. Step 2: Convert to fraction form
   107,123.78/147,828.30 = 61,801.86/x
3. Step 3: Cross multiply
   107,123.78x = 147,828.30 × 61,801.86
4. Step 4: Simplify right side
   107,123.78x = 9,136,063,900.64
5. Step 5: Solve for x
   x = 9,136,063,900.64/107,123.78
6. Step 6: Final answer
   x = 85,285.12