Finding the Fourth Proportional to 139,953.72, 210,011.88 and 58,894.77

Step by Step Solution

1. Step 1: Write the proportion equation
   139,953.72 : 210,011.88 = 58,894.77 : x
2. Step 2: Convert to fraction form
   139,953.72/210,011.88 = 58,894.77/x
3. Step 3: Cross multiply
   139,953.72x = 210,011.88 × 58,894.77
4. Step 4: Simplify right side
   139,953.72x = 12,368,601,369.87
5. Step 5: Solve for x
   x = 12,368,601,369.87/139,953.72
6. Step 6: Final answer
   x = 88,376.37