Finding the Fourth Proportional to 152,402.56, 210,266.64 and 98,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   152,402.56 : 210,266.64 = 98,728.72 : x
2. Step 2: Convert to fraction form
   152,402.56/210,266.64 = 98,728.72/x
3. Step 3: Cross multiply
   152,402.56x = 210,266.64 × 98,728.72
4. Step 4: Simplify right side
   152,402.56x = 20,759,356,225.90
5. Step 5: Solve for x
   x = 20,759,356,225.90/152,402.56
6. Step 6: Final answer
   x = 136,213.96