Finding the Fourth Proportional to 107,726.79, 148,669.10 and 64,719.43

Step by Step Solution

1. Step 1: Write the proportion equation
   107,726.79 : 148,669.10 = 64,719.43 : x
2. Step 2: Convert to fraction form
   107,726.79/148,669.10 = 64,719.43/x
3. Step 3: Cross multiply
   107,726.79x = 148,669.10 × 64,719.43
4. Step 4: Simplify right side
   107,726.79x = 9,621,779,410.61
5. Step 5: Solve for x
   x = 9,621,779,410.61/107,726.79
6. Step 6: Final answer
   x = 89,316.50