Finding the Fourth Proportional to 72,400.61, 108,599.34 and 19,810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,400.61 : 108,599.34 = 19,810.10 : x
2. Step 2: Convert to fraction form
   72,400.61/108,599.34 = 19,810.10/x
3. Step 3: Cross multiply
   72,400.61x = 108,599.34 × 19,810.10
4. Step 4: Simplify right side
   72,400.61x = 2,151,363,242.34
5. Step 5: Solve for x
   x = 2,151,363,242.34/72,400.61
6. Step 6: Final answer
   x = 29,714.71