Finding the Fourth Proportional to 89,694.79, 134,476.30 and 42,980.47

Step by Step Solution

1. Step 1: Write the proportion equation
   89,694.79 : 134,476.30 = 42,980.47 : x
2. Step 2: Convert to fraction form
   89,694.79/134,476.30 = 42,980.47/x
3. Step 3: Cross multiply
   89,694.79x = 134,476.30 × 42,980.47
4. Step 4: Simplify right side
   89,694.79x = 5,779,854,577.86
5. Step 5: Solve for x
   x = 5,779,854,577.86/89,694.79
6. Step 6: Final answer
   x = 64,439.13