Finding the Fourth Proportional to 70,886.32, 97,779.85 and 42,186.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,886.32 : 97,779.85 = 42,186.72 : x
2. Step 2: Convert to fraction form
   70,886.32/97,779.85 = 42,186.72/x
3. Step 3: Cross multiply
   70,886.32x = 97,779.85 × 42,186.72
4. Step 4: Simplify right side
   70,886.32x = 4,125,011,153.59
5. Step 5: Solve for x
   x = 4,125,011,153.59/70,886.32
6. Step 6: Final answer
   x = 58,191.92