Finding the Fourth Proportional to 139,480.08, 209,214.63 and 59,485.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,480.08 : 209,214.63 = 59,485.08 : x
2. Step 2: Convert to fraction form
   139,480.08/209,214.63 = 59,485.08/x
3. Step 3: Cross multiply
   139,480.08x = 209,214.63 × 59,485.08
4. Step 4: Simplify right side
   139,480.08x = 12,445,149,002.72
5. Step 5: Solve for x
   x = 12,445,149,002.72/139,480.08
6. Step 6: Final answer
   x = 89,225.28