Finding the Fourth Proportional to 139,070.04, 208,512.88 and 50,312

Step by Step Solution

1. Step 1: Write the proportion equation
   139,070.04 : 208,512.88 = 50,312 : x
2. Step 2: Convert to fraction form
   139,070.04/208,512.88 = 50,312/x
3. Step 3: Cross multiply
   139,070.04x = 208,512.88 × 50,312
4. Step 4: Simplify right side
   139,070.04x = 10,490,700,018.56
5. Step 5: Solve for x
   x = 10,490,700,018.56/139,070.04
6. Step 6: Final answer
   x = 75,434.65