Finding the Fourth Proportional to 66,671.98, 91,971 and 42,802.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,671.98 : 91,971 = 42,802.25 : x
2. Step 2: Convert to fraction form
   66,671.98/91,971 = 42,802.25/x
3. Step 3: Cross multiply
   66,671.98x = 91,971 × 42,802.25
4. Step 4: Simplify right side
   66,671.98x = 3,936,565,274.90
5. Step 5: Solve for x
   x = 3,936,565,274.90/66,671.98
6. Step 6: Final answer
   x = 59,043.78