Finding the Fourth Proportional to 98,834.72, 136,390.56 and 54,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,834.72 : 136,390.56 = 54,122.72 : x
2. Step 2: Convert to fraction form
   98,834.72/136,390.56 = 54,122.72/x
3. Step 3: Cross multiply
   98,834.72x = 136,390.56 × 54,122.72
4. Step 4: Simplify right side
   98,834.72x = 7,381,828,089.52
5. Step 5: Solve for x
   x = 7,381,828,089.52/98,834.72
6. Step 6: Final answer
   x = 74,688.61