Finding the Fourth Proportional to 56,892,985.72, 78,511,722.06 and 30,786,931.96

Step by Step Solution

1. Step 1: Write the proportion equation
   56,892,985.72 : 78,511,722.06 = 30,786,931.96 : x
2. Step 2: Convert to fraction form
   56,892,985.72/78,511,722.06 = 30,786,931.96/x
3. Step 3: Cross multiply
   56,892,985.72x = 78,511,722.06 × 30,786,931.96
4. Step 4: Simplify right side
   56,892,985.72x = 2,417,135,045,123,651
5. Step 5: Solve for x
   x = 2,417,135,045,123,651/56,892,985.72
6. Step 6: Final answer
   x = 42,485,642.38