Finding the Fourth Proportional to 107,372.16, 148,149.72 and 64,929.78

Step by Step Solution

1. Step 1: Write the proportion equation
   107,372.16 : 148,149.72 = 64,929.78 : x
2. Step 2: Convert to fraction form
   107,372.16/148,149.72 = 64,929.78/x
3. Step 3: Cross multiply
   107,372.16x = 148,149.72 × 64,929.78
4. Step 4: Simplify right side
   107,372.16x = 9,619,328,726.66
5. Step 5: Solve for x
   x = 9,619,328,726.66/107,372.16
6. Step 6: Final answer
   x = 89,588.67