Finding the Fourth Proportional to 65,964.85, 91,026.99 and 42,088.89

Step by Step Solution

1. Step 1: Write the proportion equation
   65,964.85 : 91,026.99 = 42,088.89 : x
2. Step 2: Convert to fraction form
   65,964.85/91,026.99 = 42,088.89/x
3. Step 3: Cross multiply
   65,964.85x = 91,026.99 × 42,088.89
4. Step 4: Simplify right side
   65,964.85x = 3,831,224,969.14
5. Step 5: Solve for x
   x = 3,831,224,969.14/65,964.85
6. Step 6: Final answer
   x = 58,079.80