Finding the Fourth Proportional to 145,061.10, 217,300.05 and 97,821.90

Step by Step Solution

1. Step 1: Write the proportion equation
   145,061.10 : 217,300.05 = 97,821.90 : x
2. Step 2: Convert to fraction form
   145,061.10/217,300.05 = 97,821.90/x
3. Step 3: Cross multiply
   145,061.10x = 217,300.05 × 97,821.90
4. Step 4: Simplify right side
   145,061.10x = 21,256,703,761.10
5. Step 5: Solve for x
   x = 21,256,703,761.10/145,061.10
6. Step 6: Final answer
   x = 146,536.21