Finding the Fourth Proportional to 64,795.40, 89,434.35 and 42,190.86

Step by Step Solution

1. Step 1: Write the proportion equation
   64,795.40 : 89,434.35 = 42,190.86 : x
2. Step 2: Convert to fraction form
   64,795.40/89,434.35 = 42,190.86/x
3. Step 3: Cross multiply
   64,795.40x = 89,434.35 × 42,190.86
4. Step 4: Simplify right side
   64,795.40x = 3,773,312,140.04
5. Step 5: Solve for x
   x = 3,773,312,140.04/64,795.40
6. Step 6: Final answer
   x = 58,234.26