Finding the Fourth Proportional to 112,697.19, 155,499.89 and 64,298.07

Step by Step Solution

1. Step 1: Write the proportion equation
   112,697.19 : 155,499.89 = 64,298.07 : x
2. Step 2: Convert to fraction form
   112,697.19/155,499.89 = 64,298.07/x
3. Step 3: Cross multiply
   112,697.19x = 155,499.89 × 64,298.07
4. Step 4: Simplify right side
   112,697.19x = 9,998,342,490.72
5. Step 5: Solve for x
   x = 9,998,342,490.72/112,697.19
6. Step 6: Final answer
   x = 88,718.65