Finding the Fourth Proportional to 61,641, 85,239.54 and 58,856.22

Step by Step Solution

1. Step 1: Write the proportion equation
   61,641 : 85,239.54 = 58,856.22 : x
2. Step 2: Convert to fraction form
   61,641/85,239.54 = 58,856.22/x
3. Step 3: Cross multiply
   61,641x = 85,239.54 × 58,856.22
4. Step 4: Simplify right side
   61,641x = 5,016,877,118.94
5. Step 5: Solve for x
   x = 5,016,877,118.94/61,641
6. Step 6: Final answer
   x = 81,388.64