Finding the Fourth Proportional to 527,238.72, 790,855.20 and 127,878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   527,238.72 : 790,855.20 = 127,878.72 : x
2. Step 2: Convert to fraction form
   527,238.72/790,855.20 = 127,878.72/x
3. Step 3: Cross multiply
   527,238.72x = 790,855.20 × 127,878.72
4. Step 4: Simplify right side
   527,238.72x = 101,133,550,681.34
5. Step 5: Solve for x
   x = 101,133,550,681.34/527,238.72
6. Step 6: Final answer
   x = 191,817.38