Finding the Fourth Proportional to 139,167.77, 208,779.78 and 59,205.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,167.77 : 208,779.78 = 59,205.58 : x
2. Step 2: Convert to fraction form
   139,167.77/208,779.78 = 59,205.58/x
3. Step 3: Cross multiply
   139,167.77x = 208,779.78 × 59,205.58
4. Step 4: Simplify right side
   139,167.77x = 12,360,928,508.60
5. Step 5: Solve for x
   x = 12,360,928,508.60/139,167.77
6. Step 6: Final answer
   x = 88,820.34