Finding the Fourth Proportional to 112,991.34, 169,420.56 and 42,875.58

Step by Step Solution

1. Step 1: Write the proportion equation
   112,991.34 : 169,420.56 = 42,875.58 : x
2. Step 2: Convert to fraction form
   112,991.34/169,420.56 = 42,875.58/x
3. Step 3: Cross multiply
   112,991.34x = 169,420.56 × 42,875.58
4. Step 4: Simplify right side
   112,991.34x = 7,264,004,773.92
5. Step 5: Solve for x
   x = 7,264,004,773.92/112,991.34
6. Step 6: Final answer
   x = 64,288.15