Finding the Fourth Proportional to 89,649.18, 134,506.98 and 42,870.06

Step by Step Solution

1. Step 1: Write the proportion equation
   89,649.18 : 134,506.98 = 42,870.06 : x
2. Step 2: Convert to fraction form
   89,649.18/134,506.98 = 42,870.06/x
3. Step 3: Cross multiply
   89,649.18x = 134,506.98 × 42,870.06
4. Step 4: Simplify right side
   89,649.18x = 5,766,322,303.02
5. Step 5: Solve for x
   x = 5,766,322,303.02/89,649.18
6. Step 6: Final answer
   x = 64,320.97