Finding the Fourth Proportional to 65,964.06, 91,026.06 and 42,088.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,964.06 : 91,026.06 = 42,088.20 : x
2. Step 2: Convert to fraction form
   65,964.06/91,026.06 = 42,088.20/x
3. Step 3: Cross multiply
   65,964.06x = 91,026.06 × 42,088.20
4. Step 4: Simplify right side
   65,964.06x = 3,831,123,018.49
5. Step 5: Solve for x
   x = 3,831,123,018.49/65,964.06
6. Step 6: Final answer
   x = 58,078.95