Finding the Fourth Proportional to 72,298.74, 99,803.70 and 54,398.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,298.74 : 99,803.70 = 54,398.16 : x
2. Step 2: Convert to fraction form
   72,298.74/99,803.70 = 54,398.16/x
3. Step 3: Cross multiply
   72,298.74x = 99,803.70 × 54,398.16
4. Step 4: Simplify right side
   72,298.74x = 5,429,137,641.19
5. Step 5: Solve for x
   x = 5,429,137,641.19/72,298.74
6. Step 6: Final answer
   x = 75,093.12