Finding the Fourth Proportional to 12,931,156.31, 19,374,784.65 and 7,802,810.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931,156.31 : 19,374,784.65 = 7,802,810.82 : x
2. Step 2: Convert to fraction form
   12,931,156.31/19,374,784.65 = 7,802,810.82/x
3. Step 3: Cross multiply
   12,931,156.31x = 19,374,784.65 × 7,802,810.82
4. Step 4: Simplify right side
   12,931,156.31x = 151,177,779,302,189.91
5. Step 5: Solve for x
   x = 151,177,779,302,189.91/12,931,156.31
6. Step 6: Final answer
   x = 11,690,971.46