Finding the Fourth Proportional to 61,640.56, 85,066.15 and 34,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,640.56 : 85,066.15 = 34,781.50 : x
2. Step 2: Convert to fraction form
   61,640.56/85,066.15 = 34,781.50/x
3. Step 3: Cross multiply
   61,640.56x = 85,066.15 × 34,781.50
4. Step 4: Simplify right side
   61,640.56x = 2,958,727,783.94
5. Step 5: Solve for x
   x = 2,958,727,783.94/61,640.56
6. Step 6: Final answer
   x = 47,999.69