Finding the Fourth Proportional to 78,157, 107,856.03 and 42,346.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,157 : 107,856.03 = 42,346.90 : x
2. Step 2: Convert to fraction form
   78,157/107,856.03 = 42,346.90/x
3. Step 3: Cross multiply
   78,157x = 107,856.03 × 42,346.90
4. Step 4: Simplify right side
   78,157x = 4,567,368,516.81
5. Step 5: Solve for x
   x = 4,567,368,516.81/78,157
6. Step 6: Final answer
   x = 58,438.38